51257532 has 12 divisors (see below), whose sum is σ = 119600936. Its totient is φ = 17085840.

The previous prime is 51257509. The next prime is 51257561. The reversal of 51257532 is 23575215.

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 51257532.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2135719 + ... + 2135742.

Almost surely, 2^51257532 is an apocalyptic number.

It is an amenable number.

51257532 is an abundant number, since it is smaller than the sum of its proper divisors (68343404).

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

51257532 is a wasteful number, since it uses less digits than its factorization.

51257532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4271468 (or 4271466 counting only the distinct ones).

The product of its digits is 10500, while the sum is 30.

The square root of 51257532 is about 7159.4365700102. The cubic root of 51257532 is about 371.4661379023.

The spelling of 51257532 in words is "fifty-one million, two hundred fifty-seven thousand, five hundred thirty-two".