51995982 has 16 divisors (see below), whose sum is σ = 104113152. Its totient is φ = 17311800.

The previous prime is 51995981. The next prime is 51996001. The reversal of 51995982 is 28959915.

It is a happy number.

51995982 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 (51995981) 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, 1107 + ... + 10257.

It is an arithmetic number, because the mean of its divisors is an integer number (6507072).

Almost surely, 2^51995982 is an apocalyptic number.

51995982 is an abundant number, since it is smaller than the sum of its proper divisors (52117170).

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

51995982 is a wasteful number, since it uses less digits than its factorization.

51995982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10103.

The product of its digits is 291600, while the sum is 48.

The square root of 51995982 is about 7210.8239473724. The cubic root of 51995982 is about 373.2415018252.

The spelling of 51995982 in words is "fifty-one million, nine hundred ninety-five thousand, nine hundred eighty-two".