51987152 has 20 divisors (see below), whose sum is σ = 115114656. Its totient is φ = 22280160.

The previous prime is 51987151. The next prime is 51987157. The reversal of 51987152 is 25178915.

It is a super-2 number, since 2×51987152² = 5405327946142208, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51987151) 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, 231974 + ... + 232197.

Almost surely, 2^51987152 is an apocalyptic number.

It is an amenable number.

51987152 is an abundant number, since it is smaller than the sum of its proper divisors (63127504).

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

51987152 is a wasteful number, since it uses less digits than its factorization.

51987152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464186 (or 464180 counting only the distinct ones).

The product of its digits is 25200, while the sum is 38.

The square root of 51987152 is about 7210.2116473790. The cubic root of 51987152 is about 373.2203725705.

The spelling of 51987152 in words is "fifty-one million, nine hundred eighty-seven thousand, one hundred fifty-two".