51291315 has 12 divisors (see below), whose sum is σ = 88905024. Its totient is φ = 27355344.

The previous prime is 51291299. The next prime is 51291337. The reversal of 51291315 is 51319215.

51291315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51291315 - 2⁴ = 51291299 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 569859 + ... + 569948.

It is an arithmetic number, because the mean of its divisors is an integer number (7408752).

Almost surely, 2^51291315 is an apocalyptic number.

51291315 is a deficient number, since it is larger than the sum of its proper divisors (37613709).

51291315 is a wasteful number, since it uses less digits than its factorization.

51291315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139818 (or 1139815 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

The square root of 51291315 is about 7161.7955150926. The cubic root of 51291315 is about 371.5477290627.

The spelling of 51291315 in words is "fifty-one million, two hundred ninety-one thousand, three hundred fifteen".