Properties of the Number 21013

Twenty-One Thousand Thirteen

Basics

Value: 21012 → 21013 → 21014

Parity: odd

Prime: Yes

Previous Prime: 21011

Next Prime: 21017

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 21013

Divisors: 1, 21013

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101001000010101

Octal: 51025

Duodecimal: 101B1

Hexadecimal: 5215

Square: 441546169

Square Root: 144.9586147836685

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 of reduced words of length n in the Weyl group D₇. A162210

Primes of the form j² + (j+1)². A27862

Primes followed by a [4,2,4] prime difference pattern of A001223. A52378

Mother primes of order 8. A136067

Primes obtained from other primes by pre-concatenating with 2. A165243

Intersection of A251964, A252280 and A252281. A252283

Prime(n) and prime(n+4) use the same digits. A69796

Downward vertical of triangular spiral in A051682. A81272

Primes p such that 4+p, 4+p², 4+p³ and 4+p⁵ are all prime. A246519

Primes of the form (1 + x)^y + (-x)^y where y is a divisor of x. A285887