51709168 has 20 divisors (see below), whose sum is σ = 114499120. Its totient is φ = 22161024.

The previous prime is 51709157. The next prime is 51709169. The reversal of 51709168 is 86190715.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51709169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230733 + ... + 230956.

It is an arithmetic number, because the mean of its divisors is an integer number (5724956).

Almost surely, 2^51709168 is an apocalyptic number.

It is an amenable number.

51709168 is an abundant number, since it is smaller than the sum of its proper divisors (62789952).

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

51709168 is a wasteful number, since it uses less digits than its factorization.

51709168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461704 (or 461698 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 51709168 is about 7190.9087047466. The cubic root of 51709168 is about 372.5539594219.

The spelling of 51709168 in words is "fifty-one million, seven hundred nine thousand, one hundred sixty-eight".