51965980 has 24 divisors (see below), whose sum is σ = 119049840. Its totient is φ = 18896640.

The previous prime is 51965971. The next prime is 51965981. The reversal of 51965980 is 8956915.

It is a happy number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51965981) 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 7 ways as a sum of consecutive naturals, for example, 117885 + ... + 118324.

It is an arithmetic number, because the mean of its divisors is an integer number (4960410).

Almost surely, 2^51965980 is an apocalyptic number.

It is an amenable number.

51965980 is an abundant number, since it is smaller than the sum of its proper divisors (67083860).

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

51965980 is a wasteful number, since it uses less digits than its factorization.

51965980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236229 (or 236227 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 51965980 is about 7208.7433024072. The cubic root of 51965980 is about 373.1697004695.

The spelling of 51965980 in words is "fifty-one million, nine hundred sixty-five thousand, nine hundred eighty".