513713138 has 4 divisors (see below), whose sum is σ = 770569710. Its totient is φ = 256856568.

The previous prime is 513713113. The next prime is 513713159. The reversal of 513713138 is 831317315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 487835569 + 25877569 = 22087^2 + 5087^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128428283 + ... + 128428286.

Almost surely, 2^513713138 is an apocalyptic number.

513713138 is a deficient number, since it is larger than the sum of its proper divisors (256856572).

513713138 is a wasteful number, since it uses less digits than its factorization.

513713138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256856571.

The product of its digits is 7560, while the sum is 32.

The square root of 513713138 is about 22665.2407443645. The cubic root of 513713138 is about 800.8912660623.

The spelling of 513713138 in words is "five hundred thirteen million, seven hundred thirteen thousand, one hundred thirty-eight".