Properties of the Number 43215

Forty-Three Thousand Two Hundred Fifteen

Basics

Value: 43214 → 43215 → 43216

Parity: odd

Prime: No

Previous Prime: 43207

Next Prime: 43223

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 43 × 67

Divisors: 1, 3, 5, 15, 43, 67, 129, 201, 215, 335

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1010100011001111

Octal: 124317

Duodecimal: 21013

Hexadecimal: a8cf

Square: 1867536225

Square Root: 207.88217816830763

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

Ruth-Aaron numbers (2): sum of prime divisors of n = sum of prime divisors of n+1 (both taken with multiplicity). A39752

a(n) = T(n, 2·n-7), T given by A027960. A27969

Number of primitive (period n) n-bead necklaces with exactly three different colored beads. A56288

Largest multiple of n that can be formed using the digits of first n natural numbers. A83431

Numbers with 5 distinct digits {1,2,3,4,5} such that all adjacent digits (as well as first and last digits) are coprime. A104972

Least k such that the sum of the semiprime divisors equals n times the sum of the prime divisors, or 0 if no such k exists. A227419

Numbers k such that sopf(k) = sopfr(k+1), where sopf(k) = A008472(k) and sopfr(k) = A001414(k). A64678

Array read by rows in which the n-th row contains the multiples of n in increasing order using all the digits of first n numbers. A78189

Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k doubledescents (0 <= k <= n-2). We say that i is a doubledescent (also called a double fall) of a permutation p if p(i) > p(i+1) > p(i+2). A162975

Central binomial coefficient - 1. A14495