51931146425 has 12 divisors (see below), whose sum is σ = 64446717036. Its totient is φ = 41511307200.

The previous prime is 51931146373. The next prime is 51931146433. The reversal of 51931146425 is 52464113915.

51931146425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 2355452089 + 49575694336 = 48533^2 + 222656^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51931146425 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 808706 + ... + 870555.

It is an arithmetic number, because the mean of its divisors is an integer number (5370559753).

Almost surely, 2^51931146425 is an apocalyptic number.

It is an amenable number.

51931146425 is a deficient number, since it is larger than the sum of its proper divisors (12515570611).

51931146425 is a wasteful number, since it uses less digits than its factorization.

51931146425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680508 (or 1680503 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The spelling of 51931146425 in words is "fifty-one billion, nine hundred thirty-one million, one hundred forty-six thousand, four hundred twenty-five".