513251375238 has 48 divisors (see below), whose sum is σ = 1326772269360. Its totient is φ = 146643249312.

The previous prime is 513251375213. The next prime is 513251375251. The reversal of 513251375238 is 832573152315.

513251375238 is a `hidden beast` number, since 5 + 1 + 3 + 251 + 375 + 23 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 513251375193 and 513251375202.

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 23 ways as a sum of consecutive naturals, for example, 96983631 + ... + 96988922.

It is an arithmetic number, because the mean of its divisors is an integer number (27641088945).

Almost surely, 2^513251375238 is an apocalyptic number.

513251375238 is an abundant number, since it is smaller than the sum of its proper divisors (813520894122).

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

513251375238 is a wasteful number, since it uses less digits than its factorization.

513251375238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193972578 (or 193972565 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The spelling of 513251375238 in words is "five hundred thirteen billion, two hundred fifty-one million, three hundred seventy-five thousand, two hundred thirty-eight".