513031020 has 24 divisors (see below), whose sum is σ = 1436487024. Its totient is φ = 136808256.

The previous prime is 513031009. The next prime is 513031037. The reversal of 513031020 is 20130315.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 4275199 + ... + 4275318.

It is an arithmetic number, because the mean of its divisors is an integer number (59853626).

Almost surely, 2^513031020 is an apocalyptic number.

It is an amenable number.

513031020 is an abundant number, since it is smaller than the sum of its proper divisors (923456004).

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

513031020 is a wasteful number, since it uses less digits than its factorization.

513031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8550529 (or 8550527 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 513031020 is about 22650.1880786893. The cubic root of 513031020 is about 800.5366295388.

Adding to 513031020 its reverse (20130315), we get a palindrome (533161335).

The spelling of 513031020 in words is "five hundred thirteen million, thirty-one thousand, twenty".