Properties of the Number 19915

Nineteen Thousand Nine Hundred Fifteen

Basics

Value: 19914 → 19915 → 19916

Parity: odd

Prime: No

Previous Prime: 19913

Next Prime: 19919

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 5 × 7 × 569

Divisors: 1, 5, 7, 35, 569, 2845, 3983, 19915

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100110111001011

Octal: 46713

Duodecimal: B637

Hexadecimal: 4dcb

Square: 396607225

Square Root: 141.12051587207299

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

Partial sums of A127511. A127513

Number of partitions of n containing at least one part m-8 if m is the largest part. A212548

Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 8 (most significant digit on right). A29501

First of three consecutive Ulam numbers (A002858) in arithmetic progression with difference 22. A68856

Decimal expansion of tangent of 17 degrees. A19915

Integers m such that φ(m) = (2/3)*(m+1). A383521