Properties of the Number 31826

Thirty-One Thousand Eight Hundred Twenty-Six

Basics

Value: 31825 → 31826 → 31827

Parity: even

Prime: No

Previous Prime: 31817

Next Prime: 31847

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 15913

Divisors: 1, 2, 15913, 31826

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111110001010010

Octal: 76122

Duodecimal: 16502

Hexadecimal: 7c52

Square: 1012894276

Square Root: 178.39843048636948

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 compositions (ordered partitions) of n into distinct parts, the least being 6. A339169

Number of Ferrers diagrams with a single strictly smaller Ferrers puncture with the same orientation removed from the top with half-perimeter = n. A133107

a(n) = coefficient of xⁿ, n >= 0, in A(x) such that: 2 = ∑_n=-oo..+oo x^2·n * (1 - xⁿ)^2·n * A(x)ⁿ. A357546

Number of 5 X n 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards. A281473

Numbers k such that there is no prime p and index j > k such that A002182(j) = p·A002182(k). A309042

Smallest semiprime S starting a chain of exactly n semiprimes from iterating f(S) = 2·S+1. A114330

Smallest m such that A306305(m) = n. A306425

Number of proper covers of an n-set. A7537

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 58 ones. A31826

Number of nX6 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors. A208320