Properties of the Number -31085

Thirty-One Thousand Eighty-Five

Basics

Value: -31086 → -31085 → -31084

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 6217

Divisors: 1, 5, 6217, 31085

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111100101101101

Octal: -74555

Duodecimal: -15BA5

Hexadecimal: -796d

Square: 966277225

Square Root: 176.30938715791623

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 conjugacy class of index n subgroups in PSL₂ (ZZ). A121350

Number of integer partitions of n that are either constant or relatively prime. A338553

G.f.: ∏_k>0 (1+x^k)/((1-x^k)*(1+x^3k)*(1+x^5k)). A100823

Let f(m) = number of steps needed to reach a Harshad number when the map k->A062028(l) is iterated starting at m; a(n) = smallest m such that f(m) = n. A181664

9·n analog to Keith numbers. A282764

a(n) = number of semistandard Young tableau families, headed by a father SSYT, containing daughter SSYT of shape equal to once-trimmed father's shape, so that union of families equals all SSYT with sum of entries n. A228129

Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 19. A51984

Numbers n such that 6ⁿ-5ⁿ⁺¹ is prime. A272781