51913880 has 16 divisors (see below), whose sum is σ = 116806320. Its totient is φ = 20765536.

The previous prime is 51913879. The next prime is 51913889. The reversal of 51913880 is 8831915.

It is a self number, because there is not a number n which added to its sum of digits gives 51913880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51913889) 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, 648884 + ... + 648963.

It is an arithmetic number, because the mean of its divisors is an integer number (7300395).

Almost surely, 2^51913880 is an apocalyptic number.

It is an amenable number.

51913880 is an abundant number, since it is smaller than the sum of its proper divisors (64892440).

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

51913880 is a wasteful number, since it uses less digits than its factorization.

51913880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297858 (or 1297854 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 51913880 is about 7205.1287288986. The cubic root of 51913880 is about 373.0449480678.

The spelling of 51913880 in words is "fifty-one million, nine hundred thirteen thousand, eight hundred eighty".