Properties of the Number 31420

Thirty-One Thousand Four Hundred Twenty

Basics

Value: 31419 → 31420 → 31421

Parity: even

Prime: No

Previous Prime: 31397

Next Prime: 31469

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 5 × 1571

Divisors: 1, 2, 4, 5, 10, 20, 1571, 3142, 6284, 7855

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111101010111100

Octal: 75274

Duodecimal: 16224

Hexadecimal: 7abc

Square: 987216400

Square Root: 177.25687574816385

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 non-isomorphic multiset partitions of weight n using singletons or pairs. A320663

T(n,k)=Number of length n+2 0..k arrays with the sum of the maximum minus the minimum of adjacent triples multiplied by some arrangement of +-1 equal to zero. A252177

Numbers such that the digital sum base 2 and the digital sum base 3 and the digital sum base 10 all are equal. A135120

Each permutation in the list A060117 converted to Site Swap notation, with digits reversed. "Zero throws" (fixed elements) indicated with 0's. A60496

Number of unrooted binary leaf-multi-labeled trees with n leaves on the label set [4]. A220828

(x,y) = (a(n),a(n+1)) are the solutions of (t(x)+t(y))/(1+xy) = t(4) = 10, where t(n) denotes the n-th triangular number t(n) = n*(n+1)/2. A65930

Number of length n+2 0..3 arrays with the sum of the maximum minus the minimum of adjacent triples multiplied by some arrangement of +-1 equal to zero. A252172

Numbers k such that (10^k/8 + 1)/9 is prime. A296059

Number of length 6+2 0..n arrays with the sum of the maximum minus the minimum of adjacent triples multiplied by some arrangement of +-1 equal to zero. A252182

Array read by antidiagonals: T(n,k) is the number of leaf colored trees with n leaves of k colors and all non-leaf nodes having degree 3. A339649