513661020 has 24 divisors (see below), whose sum is σ = 1438251024. Its totient is φ = 136976256.

The previous prime is 513661019. The next prime is 513661039. The reversal of 513661020 is 20166315.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4280449 + ... + 4280568.

It is an arithmetic number, because the mean of its divisors is an integer number (59927126).

Almost surely, 2^513661020 is an apocalyptic number.

It is an amenable number.

513661020 is an abundant number, since it is smaller than the sum of its proper divisors (924590004).

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

513661020 is a wasteful number, since it uses less digits than its factorization.

513661020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8561029 (or 8561027 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 513661020 is about 22664.0909811093. The cubic root of 513661020 is about 800.8641807368.

The spelling of 513661020 in words is "five hundred thirteen million, six hundred sixty-one thousand, twenty".