422
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 8
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 636
- Proper Divisor Sum (Aliquot Sum)
- 214
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 210
- Möbius Function
- 1
- Radical
- 422
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 40
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Names
- German
- vierhundertzweiundzwanzig· ordinal: vierhundertzweiundzwanzigste
- English
- four hundred twenty-two· ordinal: four hundred twenty-second
- Spanish
- cuatrocientos veintidós· ordinal: 422º
- French
- quatre cent vingt-deux· ordinal: quatre cent vingt-deuxième
- Italian
- quattrocentoventidue· ordinal: 422º
- Latin
- quadringenti viginti duo· ordinal: 422.
- Portuguese
- quatrocentos e vinte e dois· ordinal: 422º
Appears in sequences
- Number of centered hydrocarbons with n atoms.at n=13A000022
- Numbers beginning with letter 'f' in English.at n=46A000867
- Number of Baxter permutations of length n (also called Baxter numbers).at n=6A001181
- a(n) is the solution to the postage stamp problem with n denominations and 4 stamps.at n=9A001214
- Partial sums of A001462; also a(n) is the last occurrence of n in A001462.at n=49A001463
- 2 together with primes multiplied by 2.at n=47A001747
- a(0) = 1, a(1) = 0, a(2) = -1; for n >= 3, a(n) = - a(n-2) + Sum_{ primes p with 3 <= p <= n} a(n-p).at n=39A002121
- Numbers that are the sum of 7 positive 4th powers.at n=37A003341
- Number of nonequivalent dissections of an n-gon into n-4 polygons by nonintersecting diagonals rooted at a cell up to rotation and reflection.at n=4A003448
- Inconsummate numbers in base 10: no number is this multiple of the sum of its digits (in base 10).at n=25A003635
- Number of (undirected) Hamiltonian paths in the n-ladder graph K_2 X P_n.at n=20A003682
- a(n) = floor(n*phi^8), where phi is the golden ratio, A001622.at n=9A004923
- a(n) = ceiling(n*phi^5), where phi is the golden ratio, A001622.at n=38A004960
- Starts 0, 4 and contains no 3-term arithmetic progression.at n=52A005487
- Start with 4; if k appears then so do 2k+2 and 3k+3. (duplicates omitted.)at n=44A005662
- Number of partitions of 5n into powers of 5.at n=53A005706
- x^3 + n*y^3 = 1 is solvable.at n=21A005988
- Number of corners, or planar partitions of n with only one row and one column.at n=11A006330
- Integer part of Sum_{i=1..n} binomial(n,i) * (n/i)^i.at n=5A007806
- Coordination sequence T4 for Zeolite Code EUO.at n=13A008099