51255252 has 18 divisors (see below), whose sum is σ = 129561978. Its totient is φ = 17085072.

The previous prime is 51255241. The next prime is 51255257. The reversal of 51255252 is 25255215.

51255252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 50637456 + 617796 = 7116^2 + 786^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51255257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 711843 + ... + 711914.

Almost surely, 2^51255252 is an apocalyptic number.

It is an amenable number.

51255252 is an abundant number, since it is smaller than the sum of its proper divisors (78306726).

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

51255252 is a wasteful number, since it uses less digits than its factorization.

51255252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423767 (or 1423762 counting only the distinct ones).

The product of its digits is 5000, while the sum is 27.

The square root of 51255252 is about 7159.2773378324. The cubic root of 51255252 is about 371.4606300590.

The spelling of 51255252 in words is "fifty-one million, two hundred fifty-five thousand, two hundred fifty-two".