51987332 has 12 divisors (see below), whose sum is σ = 91813260. Its totient is φ = 25754976.

The previous prime is 51987281. The next prime is 51987347. The reversal of 51987332 is 23378915.

It can be written as a sum of positive squares in 2 ways, for example, as 17106496 + 34880836 = 4136^2 + 5906^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59183 + ... + 60054.

It is an arithmetic number, because the mean of its divisors is an integer number (7651105).

Almost surely, 2^51987332 is an apocalyptic number.

It is an amenable number.

51987332 is a deficient number, since it is larger than the sum of its proper divisors (39825928).

51987332 is a wasteful number, since it uses less digits than its factorization.

51987332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119350 (or 119348 counting only the distinct ones).

The product of its digits is 45360, while the sum is 38.

The square root of 51987332 is about 7210.2241296648. The cubic root of 51987332 is about 373.2208033154.

The spelling of 51987332 in words is "fifty-one million, nine hundred eighty-seven thousand, three hundred thirty-two".