Properties of the Number 23509

Twenty-Three Thousand Five Hundred Nine

Basics

Value: 23508 → 23509 → 23510

Parity: odd

Prime: Yes

Previous Prime: 23497

Next Prime: 23531

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 23509

Divisors: 1, 23509

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101101111010101

Octal: 55725

Duodecimal: 11731

Hexadecimal: 5bd5

Square: 552673081

Square Root: 153.32644912082193

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 A(n,k) of tilings of a k X n rectangle using monominoes and trominoes of any shape; square array A(n,k), n>=0, k>=0, read by antidiagonals. A270061

Primes that are a concatenation of 2, 3 and a prime. A101218

Primes p such that p+1, p+2 and p+3 have equal number of divisors. A119711

Triangle of coefficients of polynomials v(n,x) jointly generated with A210866; see the Formula section. A210867

Primes p such that, if q is the next prime, p + q² is a prime times a power of 10. A352837

Number of tilings of a 3 X n rectangle using monominoes and trominoes of any shape. A270063

Primes remaining primes under map 3<=>5 (interchange of decimal digits 3 and 5). A198047

Primes p such that floor(log(p)) + p² is prime. A225626

a(n) = initial term of an arithmetic progression of nine primes used to form a 3 X 3 magic square with magic sum A269324(n). A269325

Number of tilings of a 6 X n rectangle using monominoes and trominoes of any shape. A270066