51912315 has 72 divisors (see below), whose sum is σ = 112786128. Its totient is φ = 21893760.

The previous prime is 51912307. The next prime is 51912317. The reversal of 51912315 is 51321915.

It is not a de Polignac number, because 51912315 - 2³ = 51912307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51912317) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 27760 + ... + 29570.

It is an arithmetic number, because the mean of its divisors is an integer number (1566474).

Almost surely, 2^51912315 is an apocalyptic number.

51912315 is an abundant number, since it is smaller than the sum of its proper divisors (60873813).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51912315 is a wasteful number, since it uses less digits than its factorization.

51912315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849 (or 1839 counting only the distinct ones).

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

The square root of 51912315 is about 7205.0201248851. The cubic root of 51912315 is about 373.0411994158.

The spelling of 51912315 in words is "fifty-one million, nine hundred twelve thousand, three hundred fifteen".