513239538 has 64 divisors (see below), whose sum is σ = 1190412288. Its totient is φ = 144497280.

The previous prime is 513239521. The next prime is 513239539. The reversal of 513239538 is 835932315.

It is a junction number, because it is equal to n+sod(n) for n = 513239496 and 513239505.

It is not an unprimeable number, because it can be changed into a prime (513239539) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1098781 + ... + 1099247.

It is an arithmetic number, because the mean of its divisors is an integer number (18600192).

Almost surely, 2^513239538 is an apocalyptic number.

513239538 is an abundant number, since it is smaller than the sum of its proper divisors (677172750).

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

513239538 is a wasteful number, since it uses less digits than its factorization.

513239538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807.

The product of its digits is 97200, while the sum is 39.

The square root of 513239538 is about 22654.7906192046. The cubic root of 513239538 is about 800.6450724205.

The spelling of 513239538 in words is "five hundred thirteen million, two hundred thirty-nine thousand, five hundred thirty-eight".