Properties of the Number 72222

Seventy-Two Thousand Two Hundred Twenty-Two

Basics

Value: 72221 → 72222 → 72223

Parity: even

Prime: No

Previous Prime: 72221

Next Prime: 72223

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 12037

Divisors: 1, 2, 3, 6, 12037, 24074, 36111, 72222

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001101000011110

Octal: 215036

Duodecimal: 35966

Hexadecimal: 11a1e

Square: 5216017284

Square Root: 268.74151149385165

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Triangular array T(n,k), read by rows: coefficients of strong divisibility sequence of polynomials p(1,x) = 1, p(2,x) = 2 + 5·x, p(n,x) = u·p(n-1,x) + v·p(n-2,x) for n >= 3, where u = p(2,x), v = 1 - 2·x - x². A367299

Number of permutations in S_n+2 containing an increasing subsequence of length n. A217200

Members of A014574 with sum of prime factors (with multiplicity) also in A014574. A349455

Least k such that 3/2 - sum{(h²)/3^h, h = 1..k} < 1/2ⁿ. A248631

a(n) = (abs(n-1-a(n-2)) mod n) + (abs(n-1-a(n-1)) mod (n-1)), a(0) = 1, a(1) = 1. A72222

Number of upper Wythoff primes (A095281) in range ]2ⁿ,2ⁿ⁺¹]. A95291