Properties of the Number 21715

Twenty-One Thousand Seven Hundred Fifteen

Basics

Value: 21714 → 21715 → 21716

Parity: odd

Prime: No

Previous Prime: 21713

Next Prime: 21727

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 5 × 43 × 101

Divisors: 1, 5, 43, 101, 215, 505, 4343, 21715

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101010011010011

Octal: 52323

Duodecimal: 10697

Hexadecimal: 54d3

Square: 471541225

Square Root: 147.36010314871527

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

Powers of cube root of 20 rounded to nearest integer. A18034

Powers of cube root of 20 rounded down. A18033

Numbers k > 1 such that, in base 6, k and k² contain the same digits in the same proportion. A61660

26-gonal numbers: a(n) = n*(12·n-11). A255185

a(n) = T(n, n-5), array T as in A055818. A55822

Shifts 8 places left under Euler transform with a(0)=0 and a(n)=1 for n<8. A218025

Consecutive states of the linear congruential pseudo-random number generator (625·s + 6571) mod 31104 when started at s=1. A385279

Numbers k such that sopf(k) = sopf(k+2), where sopf(k) = A008472(k). A63968

Number of 5-element subsets of [n] having a prime element sum. A320680

a(n) = A002861(n) + A000081(n). A124682