51531335125 has 8 divisors (see below), whose sum is σ = 64311106392. Its totient is φ = 41225068000.

The previous prime is 51531335117. The next prime is 51531335171. The reversal of 51531335125 is 52153313515.

It can be written as a sum of positive squares in 4 ways, for example, as 819447876 + 50711887249 = 28626^2 + 225193^2 .

It is not a de Polignac number, because 51531335125 - 2³ = 51531335117 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206125216 + ... + 206125465.

It is an arithmetic number, because the mean of its divisors is an integer number (8038888299).

Almost surely, 2^51531335125 is an apocalyptic number.

It is an amenable number.

51531335125 is a deficient number, since it is larger than the sum of its proper divisors (12779771267).

51531335125 is an equidigital number, since it uses as much as digits as its factorization.

51531335125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412250696 (or 412250686 counting only the distinct ones).

The product of its digits is 33750, while the sum is 34.

The spelling of 51531335125 in words is "fifty-one billion, five hundred thirty-one million, three hundred thirty-five thousand, one hundred twenty-five".