51364788 has 12 divisors (see below), whose sum is σ = 119851200. Its totient is φ = 17121592.

The previous prime is 51364787. The next prime is 51364793. The reversal of 51364788 is 88746315.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51364787) 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, 2140188 + ... + 2140211.

It is an arithmetic number, because the mean of its divisors is an integer number (9987600).

Almost surely, 2^51364788 is an apocalyptic number.

It is an amenable number.

51364788 is an abundant number, since it is smaller than the sum of its proper divisors (68486412).

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

51364788 is a wasteful number, since it uses less digits than its factorization.

51364788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280406 (or 4280404 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 51364788 is about 7166.9231892075. The cubic root of 51364788 is about 371.7250540922.

The spelling of 51364788 in words is "fifty-one million, three hundred sixty-four thousand, seven hundred eighty-eight".