51500768 has 24 divisors (see below), whose sum is σ = 110610360. Its totient is φ = 23409280.

The previous prime is 51500747. The next prime is 51500783. The reversal of 51500768 is 86700515.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

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, 72803 + ... + 73506.

It is an arithmetic number, because the mean of its divisors is an integer number (4608765).

Almost surely, 2^51500768 is an apocalyptic number.

It is an amenable number.

51500768 is an abundant number, since it is smaller than the sum of its proper divisors (59109592).

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

51500768 is a wasteful number, since it uses less digits than its factorization.

51500768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146330 (or 146322 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 51500768 is about 7176.4035560997. The cubic root of 51500768 is about 372.0527924459.

The spelling of 51500768 in words is "fifty-one million, five hundred thousand, seven hundred sixty-eight".