Properties of the Number -22387

Twenty-Two Thousand Three Hundred Eighty-Seven

Basics

Value: -22388 → -22387 → -22386

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 61 × 367

Divisors: 1, 61, 367, 22387

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4938 Try Today's Challenge

Representations

Binary: -101011101110011

Octal: -53563

Duodecimal: -10B57

Hexadecimal: -5773

Square: 501177769

Square Root: 149.62285921609705

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

Primitive numbers in A229306. A229310

T(n,k)=Number of nXk 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally. A232295

Triangle T(n, k, m) = (m*(n-k) + 1)*T(n-1, k-1, m) + (m·k + 1)*T(n-1, k, m) + m·f(n,k)*T(n-2, k-1, m) with T(n, 0, m) = T(n, n, m) = 1, f(n, k) = 2·k if k <= floor(n/2) otherwise 2*(n-k), and m = 2, read by rows. A157277

Generalized Pellian with second term equal to 9. A48696

a(n) = ((1+4·sqrt(2))*(3+2·sqrt(2))ⁿ + (1-4·sqrt(2))*(3-2·sqrt(2))ⁿ)/2. A164604

Least number·such that xⁿ has n digits equal to k. Case k = 9. A285456

Number of nX6 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally. A232293

Number of 2Xn 0..2 arrays with every 0 next to a 1 and every 1 next to a 2 horizontally or antidiagonally. A232296

Semiprimes of the form S(n) + T(n) where S(n) and T(n) are the n-th square and the n-th triangular numbers. A240914