51905712 has 20 divisors (see below), whose sum is σ = 134089880. Its totient is φ = 17301888.

The previous prime is 51905699. The next prime is 51905731. The reversal of 51905712 is 21750915.

It is a self number, because there is not a number n which added to its sum of digits gives 51905712.

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, 540637 + ... + 540732.

It is an arithmetic number, because the mean of its divisors is an integer number (6704494).

Almost surely, 2^51905712 is an apocalyptic number.

It is an amenable number.

51905712 is an abundant number, since it is smaller than the sum of its proper divisors (82184168).

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

51905712 is a wasteful number, since it uses less digits than its factorization.

51905712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081380 (or 1081374 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 51905712 is about 7204.5618881373. The cubic root of 51905712 is about 373.0253823886.

The spelling of 51905712 in words is "fifty-one million, nine hundred five thousand, seven hundred twelve".