513139057 has 8 divisors (see below), whose sum is σ = 523224360. Its totient is φ = 503068800.

The previous prime is 513139043. The next prime is 513139069. The reversal of 513139057 is 750931315.

It can be written as a sum of positive squares in 4 ways, for example, as 290054961 + 223084096 = 17031^2 + 14936^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513139057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513139007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85557 + ... + 91357.

It is an arithmetic number, because the mean of its divisors is an integer number (65403045).

Almost surely, 2^513139057 is an apocalyptic number.

It is an amenable number.

513139057 is a deficient number, since it is larger than the sum of its proper divisors (10085303).

513139057 is a wasteful number, since it uses less digits than its factorization.

513139057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7523.

The product of its (nonzero) digits is 14175, while the sum is 34.

The square root of 513139057 is about 22652.5728560797. The cubic root of 513139057 is about 800.5928194520.

The spelling of 513139057 in words is "five hundred thirteen million, one hundred thirty-nine thousand, fifty-seven".