513231130644 has 48 divisors (see below), whose sum is σ = 1236311655936. Its totient is φ = 165539404800.

The previous prime is 513231130567. The next prime is 513231130663. The reversal of 513231130644 is 446031132315.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3363004 + ... + 3512300.

It is an arithmetic number, because the mean of its divisors is an integer number (25756492832).

Almost surely, 2^513231130644 is an apocalyptic number.

It is an amenable number.

513231130644 is an abundant number, since it is smaller than the sum of its proper divisors (723080525292).

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

513231130644 is a wasteful number, since it uses less digits than its factorization.

513231130644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158576 (or 158574 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 513231130644 its reverse (446031132315), we get a palindrome (959262262959).

The spelling of 513231130644 in words is "five hundred thirteen billion, two hundred thirty-one million, one hundred thirty thousand, six hundred forty-four".