Properties of the Number 55000

Fifty-Five Thousand

Basics

Value: 54999 → 55000 → 55001

Parity: even

Prime: No

Previous Prime: 54983

Next Prime: 55001

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 ³ × 5 ⁴ × 11

Divisors: 1, 2, 4, 5, 8, 10, 11, 20, 22, 25

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 1101011011011000

Octal: 153330

Duodecimal: 279B4

Hexadecimal: d6d8

Square: 3025000000

Square Root: 234.5207879911715

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

Numbers whose decimal expansion contains only 0's and 5's. A169964

a(n) = A069537(n)/2. A88404

Triangle T(n,k) of number of digraphs with a source and a sink on n labeled nodes and k arcs, k=0,1,..,n*(n-1). A57271

A total of n married couples, including a mathematician M and his wife, are to be seated at the 2n chairs around a circular table, with no man seated next to his wife. After the ladies are seated at every other chair, M is the first man allowed to choose one of the remaining chairs. The sequence gives the number of ways of seating the other men, with no man seated next to his wife, if M chooses the chair that is 5 seats clockwise from his wife's chair. A258665

Duplicate of A121370. A137908

Integers expressible as x³ + 2·y³ (x, y > 0) in two ways. A219725

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays colored with the maximum plus the upper median of every 2X2 subblock. A236601

a(n) = n*(n-1)⁴/2. A19583

Number of n X 3 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 1 1 vertically. A207840

Least number k such that (k·M(n))² + k·M(n) - 1 is prime with M(i)=i-th Mersenne prime. A121370