51646142 has 16 divisors (see below), whose sum is σ = 83538000. Its totient is φ = 23866560.

The previous prime is 51646121. The next prime is 51646151. The reversal of 51646142 is 24164615.

51646142 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 an unprimeable number.

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, 15017 + ... + 18132.

It is an arithmetic number, because the mean of its divisors is an integer number (5221125).

Almost surely, 2^51646142 is an apocalyptic number.

51646142 is a deficient number, since it is larger than the sum of its proper divisors (31891858).

51646142 is a wasteful number, since it uses less digits than its factorization.

51646142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33211.

The product of its digits is 5760, while the sum is 29.

The square root of 51646142 is about 7186.5250295257. The cubic root of 51646142 is about 372.4025347453.

The spelling of 51646142 in words is "fifty-one million, six hundred forty-six thousand, one hundred forty-two".