513831387 has 16 divisors (see below), whose sum is σ = 693221760. Its totient is φ = 338520000.

The previous prime is 513831377. The next prime is 513831391. The reversal of 513831387 is 783138315.

It is not a de Polignac number, because 513831387 - 2⁴ = 513831371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (513831317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96039 + ... + 101247.

It is an arithmetic number, because the mean of its divisors is an integer number (43326360).

Almost surely, 2^513831387 is an apocalyptic number.

513831387 is a deficient number, since it is larger than the sum of its proper divisors (179390373).

513831387 is a wasteful number, since it uses less digits than its factorization.

513831387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5594.

The product of its digits is 60480, while the sum is 39.

The square root of 513831387 is about 22667.8491921929. The cubic root of 513831387 is about 800.9527123694.

The spelling of 513831387 in words is "five hundred thirteen million, eight hundred thirty-one thousand, three hundred eighty-seven".