51907988 has 24 divisors (see below), whose sum is σ = 100971360. Its totient is φ = 23148320.

The previous prime is 51907979. The next prime is 51907991. The reversal of 51907988 is 88970915.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8798 + ... + 13461.

It is an arithmetic number, because the mean of its divisors is an integer number (4207140).

Almost surely, 2^51907988 is an apocalyptic number.

It is an amenable number.

51907988 is a deficient number, since it is larger than the sum of its proper divisors (49063372).

51907988 is a wasteful number, since it uses less digits than its factorization.

51907988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22327 (or 22325 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 51907988 is about 7204.7198418814. The cubic root of 51907988 is about 373.0308345398.

The spelling of 51907988 in words is "fifty-one million, nine hundred seven thousand, nine hundred eighty-eight".