51646422 has 8 divisors (see below), whose sum is σ = 103292856. Its totient is φ = 17215472.

The previous prime is 51646421. The next prime is 51646457. The reversal of 51646422 is 22464615.

51646422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

51646422 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 51646422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51646421) 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 3 ways as a sum of consecutive naturals, for example, 4303863 + ... + 4303874.

It is an arithmetic number, because the mean of its divisors is an integer number (12911607).

Almost surely, 2^51646422 is an apocalyptic number.

51646422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51646422 is a wasteful number, since it uses less digits than its factorization.

51646422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8607742.

The product of its digits is 11520, while the sum is 30.

The square root of 51646422 is about 7186.5445104028. The cubic root of 51646422 is about 372.4032077386.

The spelling of 51646422 in words is "fifty-one million, six hundred forty-six thousand, four hundred twenty-two".