51888140 has 24 divisors (see below), whose sum is σ = 110814480. Its totient is φ = 20403008.

The previous prime is 51888139. The next prime is 51888169. The reversal of 51888140 is 4188815.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 51888140.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20807 + ... + 23166.

It is an arithmetic number, because the mean of its divisors is an integer number (4617270).

Almost surely, 2^51888140 is an apocalyptic number.

It is an amenable number.

51888140 is an abundant number, since it is smaller than the sum of its proper divisors (58926340).

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

51888140 is a wasteful number, since it uses less digits than its factorization.

51888140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44041 (or 44039 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 35.

The square root of 51888140 is about 7203.3422798032. The cubic root of 51888140 is about 372.9832833493.

The spelling of 51888140 in words is "fifty-one million, eight hundred eighty-eight thousand, one hundred forty".