51256142 has 16 divisors (see below), whose sum is σ = 87962112. Its totient is φ = 21943320.

The previous prime is 51256099. The next prime is 51256151. The reversal of 51256142 is 24165215.

51256142 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, 19943 + ... + 22365.

It is an arithmetic number, because the mean of its divisors is an integer number (5497632).

Almost surely, 2^51256142 is an apocalyptic number.

51256142 is a deficient number, since it is larger than the sum of its proper divisors (36705970).

51256142 is a wasteful number, since it uses less digits than its factorization.

51256142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3943.

The product of its digits is 2400, while the sum is 26.

The square root of 51256142 is about 7159.3394946741. The cubic root of 51256142 is about 371.4627800699.

The spelling of 51256142 in words is "fifty-one million, two hundred fifty-six thousand, one hundred forty-two".