Properties of the Number 31228

Thirty-One Thousand Two Hundred Twenty-Eight

Basics

Value: 31227 → 31228 → 31229

Parity: even

Prime: No

Previous Prime: 31223

Next Prime: 31231

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 37 × 211

Divisors: 1, 2, 4, 37, 74, 148, 211, 422, 844, 7807

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111100111111100

Octal: 74774

Duodecimal: 160A4

Hexadecimal: 79fc

Square: 975187984

Square Root: 176.71445894436596

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

Successive values·such that the Mordell elliptic curve x³ - y² = d has extremal points with quadratic extension over the rationals. A200656

Coordinates·of Mordell elliptic curves x³-y² for primary extremal points with quadratic extensions over rationals. A201047

Gaps of 4 in sequence A038593 (lower terms). A38647

Number of rooted trees with n nodes having some subtrees replaced by cycles. A213683

a(n) = A077696(n+1)/A077696(n). A77697

Number of distinct solutions of ∑_i=1..3(x(2i-1)*x(2i)) = 0 (mod n), with x() in 0..n-1. A180795

a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n-k+1), where k = [ n/2 ], s = (1, p(1), p(2), ...). A25099

Length of n-th run of digit 2 in A031219. A31228