Properties of the Number 22720

Twenty-Two Thousand Seven Hundred Twenty

Basics

Value: 22719 → 22720 → 22721

Parity: even

Prime: No

Previous Prime: 22717

Next Prime: 22721

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ⁶ × 5 × 71

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101100011000000

Octal: 54300

Duodecimal: 11194

Hexadecimal: 58c0

Square: 516198400

Square Root: 150.7315494513342

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

Numbers n such that p(6n) is prime, where p(n) is the number of partitions of n. A111036

Riordan array [sec(x), log(sec(x) + tan(x))]. A147309

Number of different products (including the empty product) of any subset of {1, 2, 3, ..., n}. A60957

Number of solutions to x² + y² + z² + w² <= n², where x, y, z, w are positive odd integers. A349611

Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,0) = 0ⁿ and T(n,k) = k * ∑_r=0..n binomial(n,r) * binomial(3·n+3·r+k,n)/(3·n+3·r+k) for k > 0. A378240

Numbers k such that 1·k + 1, 3·k + 1, 9·k + 1, 27·k + 1 are all primes. A112041

Riordan array [sech(x), arcsin(tanh(x))]. A147308

Riordan array [1, arcsin(tanh(x))]. A147311

Riordan array [1,log(sec(x)+tan(x))]. A147312

Numerator of Hermite(n, 16/17). A159544