51131347625 has 16 divisors (see below), whose sum is σ = 63885998592. Its totient is φ = 40857593200.

The previous prime is 51131347607. The next prime is 51131347637. The reversal of 51131347625 is 52674313115.

It is a happy number.

It is not a de Polignac number, because 51131347625 - 2¹⁶ = 51131282089 is a prime.

It is a super-2 number, since 2×51131347625² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129119 + ... + 344868.

It is an arithmetic number, because the mean of its divisors is an integer number (3992874912).

Almost surely, 2^51131347625 is an apocalyptic number.

It is an amenable number.

51131347625 is a deficient number, since it is larger than the sum of its proper divisors (12754650967).

51131347625 is an equidigital number, since it uses as much as digits as its factorization.

51131347625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474865 (or 474855 counting only the distinct ones).

The product of its digits is 75600, while the sum is 38.

The spelling of 51131347625 in words is "fifty-one billion, one hundred thirty-one million, three hundred forty-seven thousand, six hundred twenty-five".