51312621315 has 32 divisors (see below), whose sum is σ = 85018870080. Its totient is φ = 26395787264.

The previous prime is 51312621307. The next prime is 51312621317.

51312621315 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 51312621315 - 2³ = 51312621307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51312621317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 364627 + ... + 485363.

It is an arithmetic number, because the mean of its divisors is an integer number (2656839690).

Almost surely, 2^51312621315 is an apocalyptic number.

51312621315 is a deficient number, since it is larger than the sum of its proper divisors (33706248765).

51312621315 is a wasteful number, since it uses less digits than its factorization.

51312621315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121751.

The product of its digits is 5400, while the sum is 30.

The spelling of 51312621315 in words is "fifty-one billion, three hundred twelve million, six hundred twenty-one thousand, three hundred fifteen".