51395980 has 12 divisors (see below), whose sum is σ = 107931600. Its totient is φ = 20558384.

The previous prime is 51395951. The next prime is 51395983. The reversal of 51395980 is 8959315.

It is not an unprimeable number, because it can be changed into a prime (51395983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1284880 + ... + 1284919.

It is an arithmetic number, because the mean of its divisors is an integer number (8994300).

Almost surely, 2^51395980 is an apocalyptic number.

It is an amenable number.

51395980 is an abundant number, since it is smaller than the sum of its proper divisors (56535620).

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

51395980 is a wasteful number, since it uses less digits than its factorization.

51395980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569808 (or 2569806 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 51395980 is about 7169.0989670948. The cubic root of 51395980 is about 371.8002839795.

The spelling of 51395980 in words is "fifty-one million, three hundred ninety-five thousand, nine hundred eighty".