Properties of the Number 81048

Eighty-One Thousand Forty-Eight

Basics

Value: 81047 → 81048 → 81049

Parity: even

Prime: No

Previous Prime: 81047

Next Prime: 81049

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ³ × 3 × 11 × 307

Divisors: 1, 2, 3, 4, 6, 8, 11, 12, 22, 24

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110010011000

Octal: 236230

Duodecimal: 3AAA0

Hexadecimal: 13c98

Square: 6568778304

Square Root: 284.68930433017675

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

a(n) = |{m : multiplicative order of 5 mod m=n}|. A59887

Susceptibility series H₄ for 2-dimensional Ising model (divided by 2) for 1 particle excitation. A55920

Weighted sum of the harmonic numbers. A87751

Wiener index of the n X n knight graph. A292054

a(n) = Stirling1(n+1, 2) where Stirling1 is A048994. A81048

Smallest k such that A073259(k)=n or 0 if there is no such value; the first number of which length of fixed-point-list terminated by k-th composite number equals n. A73323

Number of nX4 0..2 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. A279576