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Properties of the Number 21413

Twenty-One Thousand Four Hundred Thirteen

Basics

Value: 21412 → 21413 → 21414

Parity: odd

Prime: No

Previous Prime: 21407

Next Prime: 21419

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 7 2 × 19 × 23

Divisors: 1, 7, 19, 23, 49, 133, 161, 437, 931, 1127

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001110100101

Octal: 51645

Duodecimal: 10485

Hexadecimal: 53a5

Square: 458516569

Square Root: 146.3318147225681

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 that are the sum of eight fourth powers in nine or more ways. A345584
Numbers that are the sum of eight fourth powers in ten or more ways. A345585
Numbers that are the sum of eight fourth powers in exactly ten ways. A345842
Number of partitions of n such that 2*(greatest part) > (number of parts). A237754
T(n,k)=Number of nXk 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4. A240406
a(1) = 1; thereafter a(n) is always the smallest integer > a(n-1) not leading to a contradiction, such that any five consecutive digits in the sequence sum up to a prime. A152605
Total number of parts that are the smallest part or the largest part in all partitions of n. A182978
Row sums of triangle A137639. A137640
Composite numbers k such that σ(k + σ(k)) = 2*σ(k). A246858
Number of nX3 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4. A240402