513875631 has 4 divisors (see below), whose sum is σ = 685167512. Its totient is φ = 342583752.

The previous prime is 513875611. The next prime is 513875641. The reversal of 513875631 is 136578315.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 513875631 - 2⁵ = 513875599 is a prime.

It is a super-2 number, since 2×513875631² = 528136328271296322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 513875631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513875611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85645936 + ... + 85645941.

It is an arithmetic number, because the mean of its divisors is an integer number (171291878).

Almost surely, 2^513875631 is an apocalyptic number.

513875631 is a deficient number, since it is larger than the sum of its proper divisors (171291881).

513875631 is a wasteful number, since it uses less digits than its factorization.

513875631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171291880.

The product of its digits is 75600, while the sum is 39.

The square root of 513875631 is about 22668.8250908599. The cubic root of 513875631 is about 800.9757006723.

The spelling of 513875631 in words is "five hundred thirteen million, eight hundred seventy-five thousand, six hundred thirty-one".