51178780 has 24 divisors (see below), whose sum is σ = 113132880. Its totient is φ = 19393920.

The previous prime is 51178759. The next prime is 51178781. The reversal of 51178780 is 8787115.

51178780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51178781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66961 + ... + 67720.

It is an arithmetic number, because the mean of its divisors is an integer number (4713870).

Almost surely, 2^51178780 is an apocalyptic number.

It is an amenable number.

51178780 is an abundant number, since it is smaller than the sum of its proper divisors (61954100).

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

51178780 is a wasteful number, since it uses less digits than its factorization.

51178780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134709 (or 134707 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 37.

The square root of 51178780 is about 7153.9345817529. The cubic root of 51178780 is about 371.2758003738.

The spelling of 51178780 in words is "fifty-one million, one hundred seventy-eight thousand, seven hundred eighty".