51442664 has 32 divisors (see below), whose sum is σ = 118715520. Its totient is φ = 20350656.

The previous prime is 51442661. The next prime is 51442669. The reversal of 51442664 is 46624415.

51442664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51442664.

It is not an unprimeable number, because it can be changed into a prime (51442661) 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, 34604 + ... + 36059.

It is an arithmetic number, because the mean of its divisors is an integer number (3709860).

Almost surely, 2^51442664 is an apocalyptic number.

It is an amenable number.

51442664 is an abundant number, since it is smaller than the sum of its proper divisors (67272856).

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

51442664 is a wasteful number, since it uses less digits than its factorization.

51442664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70689 (or 70685 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 51442664 is about 7172.3541463037. The cubic root of 51442664 is about 371.9128211327.

The spelling of 51442664 in words is "fifty-one million, four hundred forty-two thousand, six hundred sixty-four".