513657243 has 12 divisors (see below), whose sum is σ = 809399448. Its totient is φ = 311307360.

The previous prime is 513657233. The next prime is 513657247. The reversal of 513657243 is 342756315.

513657243 is a `hidden beast` number, since 51 + 36 + 572 + 4 + 3 = 666.

It is not a de Polignac number, because 513657243 - 2⁵ = 513657211 is a prime.

It is a super-2 number, since 2×513657243² = 527687526572722098, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 513657198 and 513657207.

It is not an unprimeable number, because it can be changed into a prime (513657247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2594130 + ... + 2594327.

It is an arithmetic number, because the mean of its divisors is an integer number (67449954).

Almost surely, 2^513657243 is an apocalyptic number.

513657243 is a deficient number, since it is larger than the sum of its proper divisors (295742205).

513657243 is a wasteful number, since it uses less digits than its factorization.

513657243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5188474 (or 5188471 counting only the distinct ones).

The product of its digits is 75600, while the sum is 36.

The square root of 513657243 is about 22664.0076553111. The cubic root of 513657243 is about 800.8622177876.

It can be divided in two parts, 513 and 657243, that added together give a palindrome (657756).

The spelling of 513657243 in words is "five hundred thirteen million, six hundred fifty-seven thousand, two hundred forty-three".