Properties of the Number 2857

Two Thousand Eight Hundred Fifty-Seven

Basics

Value: 2856 → 2857 → 2858

Parity: odd

Prime: Yes

Previous Prime: 2851

Next Prime: 2861

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2857

Divisors: 1, 2857

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101100101001

Octal: 5451

Duodecimal: 17A1

Hexadecimal: b29

Square: 8162449

Square Root: 53.45091205957107

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 p such that (p+1)/2 is prime. A5383

Number of partitions of n in which no part occurs just once. A7690

Primes that become another prime under the map 8 <-> 9 (acting on the decimal digits). A175789

Coordination sequence for (2,6,6) tiling of hyperbolic plane. A265069

Numerator of the generalized harmonic number H(n,3,1) described below. A75135

Number of partitions of n in which the greatest part is 8. A26814

Fundamental discriminants of real quadratic number fields with class number 3. A94612

Integer part of decimal 'base-2 looking' numbers divided by their actual base-2 values (denominator of a(n) is n, numerator is n written in binary but read in decimal). A32532

Triangle read by rows: numerators of Cotesian numbers C(n,k) (0 <= k <= n). A100640

Number of "ON" cells at n-th stage in simple 2-dimensional cellular automaton (see Comments for precise definition). A160118