Properties of the Number -210209

Two Hundred Ten Thousand Two Hundred Nine

Basics

Value: -210210 → -210209 → -210208

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 210209

Divisors: 1, 210209

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110011010100100001

Octal: -632441

Duodecimal: -A1795

Hexadecimal: -33521

Square: 44187823681

Square Root: 458.48555048114656

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

Primes formed by concatenating k with k-1. A52089

Primes whose decimal expansion is a concatenation of two or more consecutive decreasing numbers (no leading zeros allowed). A52088

Primes p such that 2p+1, 4p+3, 6p+5, 8p+7 are all primes. A107021

Primes p such that 2p+1, 4p+3, 6p+5, 8p+7, 10p+9 are all primes. A107022

a(n) is the least number whose sum of digits in primorial base equals n. A343048

Primes p such that 32p+1 and (p-1)/32 are both prime. A86476

Numbers k where records occur for φ(k)/φ(k+1), where φ is the Euler totient function (A000010). A335070

Primes that are the concatenation of k and k-1 for some k, where the concatenation of k-2 and k-3 is also prime. A156120

a(n) = (A242804(n)-9)/12. A257044

Numbers k such that φ(σ(k))/k < φ(σ(m))/m for all m < k, where σ is the sum of divisors function (A000203) and φ is Euler's totient function (A000010). A293711