51931201365 has 12 divisors (see below), whose sum is σ = 90014082444. Its totient is φ = 27696640704.

The previous prime is 51931201339. The next prime is 51931201379. The reversal of 51931201365 is 56310213915.

It is a happy number.

51931201365 is a `hidden beast` number, since 5 + 1 + 93 + 1 + 201 + 365 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30920408964 + 21010792401 = 175842^2 + 144951^2 .

It is not a de Polignac number, because 51931201365 - 2⁷ = 51931201237 is a prime.

It is a congruent 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, 577013304 + ... + 577013393.

It is an arithmetic number, because the mean of its divisors is an integer number (7501173537).

Almost surely, 2^51931201365 is an apocalyptic number.

It is an amenable number.

51931201365 is a deficient number, since it is larger than the sum of its proper divisors (38082881079).

51931201365 is a wasteful number, since it uses less digits than its factorization.

51931201365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154026708 (or 1154026705 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The spelling of 51931201365 in words is "fifty-one billion, nine hundred thirty-one million, two hundred one thousand, three hundred sixty-five".