513131304 has 32 divisors (see below), whose sum is σ = 1466089920. Its totient is φ = 146608896.

The previous prime is 513131303. The next prime is 513131317. The reversal of 513131304 is 403131315.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (513131303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1527009 + ... + 1527344.

It is an arithmetic number, because the mean of its divisors is an integer number (45815310).

Almost surely, 2^513131304 is an apocalyptic number.

It is an amenable number.

513131304 is an abundant number, since it is smaller than the sum of its proper divisors (952958616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513131304 is a wasteful number, since it uses less digits than its factorization.

513131304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3054369 (or 3054365 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 513131304 is about 22652.4017269693. The cubic root of 513131304 is about 800.5887873888.

Adding to 513131304 its reverse (403131315), we get a palindrome (916262619).

The spelling of 513131304 in words is "five hundred thirteen million, one hundred thirty-one thousand, three hundred four".