51539312 has 20 divisors (see below), whose sum is σ = 108935736. Its totient is φ = 23426880.

The previous prime is 51539311. The next prime is 51539377. The reversal of 51539312 is 21393515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51539311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146243 + ... + 146594.

Almost surely, 2^51539312 is an apocalyptic number.

It is an amenable number.

51539312 is an abundant number, since it is smaller than the sum of its proper divisors (57396424).

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

51539312 is a wasteful number, since it uses less digits than its factorization.

51539312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292856 (or 292850 counting only the distinct ones).

The product of its digits is 4050, while the sum is 29.

The square root of 51539312 is about 7179.0885215325. The cubic root of 51539312 is about 372.1455860575.

The spelling of 51539312 in words is "fifty-one million, five hundred thirty-nine thousand, three hundred twelve".