51657132 has 12 divisors (see below), whose sum is σ = 120533336. Its totient is φ = 17219040.

The previous prime is 51657119. The next prime is 51657163. The reversal of 51657132 is 23175615.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51657132.

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, 2152369 + ... + 2152392.

Almost surely, 2^51657132 is an apocalyptic number.

It is an amenable number.

51657132 is an abundant number, since it is smaller than the sum of its proper divisors (68876204).

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

51657132 is a wasteful number, since it uses less digits than its factorization.

51657132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4304768 (or 4304766 counting only the distinct ones).

The product of its digits is 6300, while the sum is 30.

The square root of 51657132 is about 7187.2896143122. The cubic root of 51657132 is about 372.4289479063.

The spelling of 51657132 in words is "fifty-one million, six hundred fifty-seven thousand, one hundred thirty-two".