Properties of the Number 50021

Fifty Thousand Twenty-One

Basics

Value: 50020 → 50021 → 50022

Parity: odd

Prime: Yes

Previous Prime: 49999

Next Prime: 50023

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 50021

Divisors: 1, 50021

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 1100001101100101

Octal: 141545

Duodecimal: 24B45

Hexadecimal: c365

Square: 2502100441

Square Root: 223.6537502480117

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 T(n,k) of equivalence classes of ways of placing k 2 X 2 tiles in an n X n square under all symmetry operations of the square; irregular triangle T(n,k), n>=2, 0<=k<=floor(n/2)², read by rows. A236679

Number of non-equivalent ways to place 5 non-attacking kings on an n X n board. A279114

Smallest n-digit prime beginning with n. A77504

Smallest prime in which the n-th significant digit is a 5. A69592

Primes p such that 2·prime(p) + 1 = prime(q) for some prime q. A261361

Expansion of e.g.f. exp(x·G(x)²) where G(x) = 1 + x·G(x)⁴ is the g.f. of A002293. A380514

Numbers where k-th digit from right is either 0 or k. A63013

Smallest n-digit number beginning with n and having prime signature of n, or 0 if no such number exists. A86558

Smallest prime beginning with prime(n) and having as many digits. A90927

Number of (n+4) X 8 0..1 matrices with each 5 X 5 subblock idempotent. A224686