51981796 has 24 divisors (see below), whose sum is σ = 96284160. Its totient is φ = 24487200.

The previous prime is 51981791. The next prime is 51981803. The reversal of 51981796 is 69718915.

It is a happy number.

51981796 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51981791) 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, 12726 + ... + 16306.

It is an arithmetic number, because the mean of its divisors is an integer number (4011840).

Almost surely, 2^51981796 is an apocalyptic number.

It is an amenable number.

51981796 is a deficient number, since it is larger than the sum of its proper divisors (44302364).

51981796 is a wasteful number, since it uses less digits than its factorization.

51981796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3795 (or 3793 counting only the distinct ones).

The product of its digits is 136080, while the sum is 46.

The square root of 51981796 is about 7209.8402201436. The cubic root of 51981796 is about 373.2075550641.

The spelling of 51981796 in words is "fifty-one million, nine hundred eighty-one thousand, seven hundred ninety-six".