51525216 has 36 divisors (see below), whose sum is σ = 146525652. Its totient is φ = 17174976.

The previous prime is 51525209. The next prime is 51525217. The reversal of 51525216 is 61252515.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51525216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51525217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89166 + ... + 89741.

It is an arithmetic number, because the mean of its divisors is an integer number (4070157).

Almost surely, 2^51525216 is an apocalyptic number.

It is an amenable number.

51525216 is an abundant number, since it is smaller than the sum of its proper divisors (95000436).

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

51525216 is a wasteful number, since it uses less digits than its factorization.

51525216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178923 (or 178912 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 51525216 is about 7178.1067141691. The cubic root of 51525216 is about 372.1116556958. Note that the first 3 decimals are identical.

The spelling of 51525216 in words is "fifty-one million, five hundred twenty-five thousand, two hundred sixteen".