Properties of the Number 21244

Twenty-One Thousand Two Hundred Forty-Four

Basics

Value: 21243 → 21244 → 21245

Parity: even

Prime: No

Previous Prime: 21227

Next Prime: 21247

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 47 × 113

Divisors: 1, 2, 4, 47, 94, 113, 188, 226, 452, 5311

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001011111100

Octal: 51374

Duodecimal: 10364

Hexadecimal: 52fc

Square: 451307536

Square Root: 145.7532160880164

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

Sum of the sixth powers of the parts in the partitions of n into two parts. A294273

Number of parts in all twice partitions of n where the second partition is strict. A327608

In binary representation: numbers not occurring in their factorial. A93685

Triangle T(n, k) read by rows: T(n, k) = ∑_j=0..n binomial(j, n-k) * |Stirling1(n, n-j)|. A88996

Triangle T(n,k)=∑_i=0..n |stirling1(n,n-i)|*binomial(i,k), k=0..n-1. A59364

Triangle T(n,k) read by rows: the coefficient [x^k] of the polynomial ∏_i=1..n (i+1)*x-i in row n>=0 and column 0<=k<=n. A142070

a(n) = n³/3 - 7·n/3 + 4. A270809

Sum of the odd parts in the partitions of n into 10 parts. A309661

Maximum period of a totalistic cellular automaton on a connected graph with n nodes (counting the state of the updated node itself). A357952

Expansion of 1/((1-x)*(1-2·x)*(1-7·x)*(1-11·x)). A21244