Properties of the Number 21534

Twenty-One Thousand Five Hundred Thirty-Four

Basics

Value: 21533 → 21534 → 21535

Parity: even

Prime: No

Previous Prime: 21529

Next Prime: 21557

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 37 × 97

Divisors: 1, 2, 3, 6, 37, 74, 97, 111, 194, 222

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101010000011110

Octal: 52036

Duodecimal: 10566

Hexadecimal: 541e

Square: 463713156

Square Root: 146.74467622370497

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

Number of one-element transitions among partitions of the integer n for unlabeled parts. A93695

Numbers equal to a permutation (or rearrangement) of the digits of the sum of their proper divisors. Rearrangements which cause leading zeros are excluded. A85844

Permutations of 12345: Numbers having each of the decimal digits 1,...,5 exactly once, and no other digit. A178475

Number of partitions of n in which any two parts differ by at most 7. A218509

Triangle read by rows: T(n,k) is number of Dyck n-paths with k UUDDs, 0 <= k <= n/2. A98978

a(n) = 7 + floor((1 + ∑_j=1..n-1 a(j))/4). A120165

Positive numbers k such that k and 2·k are anagrams in base 6 (written in base 6). A23064

Numbers n such that z(n) and z(n+1) are both prime, where z(n) = a^d + b^d + c^d + ..., where a·b*c* ... is the prime factorization of n and d is the largest digit of n. A109280

First row of Modified Schroeder numbers for q=7 (A114294). A114298

Terms in A177950 that are not in A002778. A175440