Properties of the Number 55687

Fifty-Five Thousand Six Hundred Eighty-Seven

Basics

Value: 55686 → 55687 → 55688

Parity: odd

Prime: No

Previous Prime: 55681

Next Prime: 55691

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 233 × 239

Divisors: 1, 233, 239, 55687

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101100110000111

Octal: 154607

Duodecimal: 28287

Hexadecimal: d987

Square: 3101041969

Square Root: 235.98093143302913

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) = prime(2·n-1)*prime(2·n). A89581

Product of the n-th sexy prime pair. A111192

Numbers n such that exactly two positive d in the range d <= n/2 exist which divide binomial(n-d-1, d-1) and which are not coprime to n. A178098

a(n) = (8·n+1)*(8·n+7). A1533

Product of adjacent primes with a gap of 6. A210477

Number of 4X2 integer matrices with each row summing to zero, row elements in nondecreasing order, rows in lexicographically nondecreasing order, and the sum of squares of the elements <= 2·n² (number of collections of 4 zero-sum 2-vectors with total modulus squared not more than 2·n², ignoring vector and component permutations). A192703

Record terms of A349664. A349665

Product of the prime numbers that are between 10·n and 10*(n+1). A356690

Numbers k such that 4^k == -1 (mod k-1). A55687