513021680 has 40 divisors (see below), whose sum is σ = 1210590672. Its totient is φ = 202143744.

The previous prime is 513021653. The next prime is 513021701. The reversal of 513021680 is 86120315.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42497 + ... + 53216.

Almost surely, 2^513021680 is an apocalyptic number.

It is an amenable number.

513021680 is an abundant number, since it is smaller than the sum of its proper divisors (697568992).

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

513021680 is a wasteful number, since it uses less digits than its factorization.

513021680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95793 (or 95787 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 513021680 is about 22649.9818984475. The cubic root of 513021680 is about 800.5317714456.

Adding to 513021680 its reverse (86120315), we get a palindrome (599141995).

The spelling of 513021680 in words is "five hundred thirteen million, twenty-one thousand, six hundred eighty".