51321180 has 48 divisors (see below), whose sum is σ = 146764800. Its totient is φ = 13393728.

The previous prime is 51321173. The next prime is 51321197. The reversal of 51321180 is 8112315.

51321180 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 an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6280 + ... + 11919.

It is an arithmetic number, because the mean of its divisors is an integer number (3057600).

Almost surely, 2^51321180 is an apocalyptic number.

It is an amenable number.

51321180 is an abundant number, since it is smaller than the sum of its proper divisors (95443620).

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

51321180 is a wasteful number, since it uses less digits than its factorization.

51321180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18258 (or 18256 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 51321180 is about 7163.8802335047. The cubic root of 51321180 is about 371.6198278184.

Adding to 51321180 its reverse (8112315), we get a palindrome (59433495).

The spelling of 51321180 in words is "fifty-one million, three hundred twenty-one thousand, one hundred eighty".