51912945 has 48 divisors (see below), whose sum is σ = 103958400. Its totient is φ = 23473152.

The previous prime is 51912923. The next prime is 51912953. The reversal of 51912945 is 54921915.

It is not a de Polignac number, because 51912945 - 2¹⁰ = 51911921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29706 + ... + 31404.

It is an arithmetic number, because the mean of its divisors is an integer number (2165800).

Almost surely, 2^51912945 is an apocalyptic number.

It is an amenable number.

51912945 is an abundant number, since it is smaller than the sum of its proper divisors (52045455).

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

51912945 is a wasteful number, since it uses less digits than its factorization.

51912945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814 (or 1811 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 51912945 is about 7205.0638442695. The cubic root of 51912945 is about 373.0427084668.

The spelling of 51912945 in words is "fifty-one million, nine hundred twelve thousand, nine hundred forty-five".