Properties of the Number -23871

Twenty-Three Thousand Eight Hundred Seventy-One

Basics

Value: -23872 → -23871 → -23870

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 73 × 109

Divisors: 1, 3, 73, 109, 219, 327, 7957, 23871

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101110100111111

Octal: -56477

Duodecimal: -11993

Hexadecimal: -5d3f

Square: 569824641

Square Root: 154.50242716540086

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

The first of three consecutive triangular numbers the sum of which is equal to the sum of three consecutive primes. A298168

a(n) is the smallest number k larger than a(n-1) such that n·d(k)*sopf(k)=σ(k), where d is the number of divisors (A000005) and sopf the sum of prime factors without repetition (A008472). A134382

Triangular numbers which have one or more occurrences of exactly five different digits. A241788

E.g.f. A(x) = 3 + Integral B(x)*C(x) dx such that C(x)² - A(x)² = 16 and B(x)² - A(x)² = 7. A323563

Triangular numbers of the form k² + k + 1. A69017

Triangular numbers representable as x·y+x+y such that·and y are triangular numbers, x>=y>0. A259745

Triangular numbers t which are average of two consecutive primes p and p+4. A129752

Number of sets of distinct positive integers whose sum of squares is a square, the largest integer of a set is n. A339612

Triangular numbers with sum of digits = 21. A68131

In A015922, not in A033553. A33554