513253863 has 24 divisors (see below), whose sum is σ = 751435776. Its totient is φ = 337554000.

The previous prime is 513253849. The next prime is 513253877. The reversal of 513253863 is 368352315.

It is an interprime number because it is at equal distance from previous prime (513253849) and next prime (513253877).

It is not a de Polignac number, because 513253863 - 2⁴ = 513253847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513253813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 217138 + ... + 219488.

It is an arithmetic number, because the mean of its divisors is an integer number (31309824).

Almost surely, 2^513253863 is an apocalyptic number.

513253863 is a deficient number, since it is larger than the sum of its proper divisors (238181913).

513253863 is a wasteful number, since it uses less digits than its factorization.

513253863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675 (or 2672 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 513253863 is about 22655.1067752946. The cubic root of 513253863 is about 800.6525212711.

The spelling of 513253863 in words is "five hundred thirteen million, two hundred fifty-three thousand, eight hundred sixty-three".