51890942 has 16 divisors (see below), whose sum is σ = 78842160. Its totient is φ = 25612608.

The previous prime is 51890939. The next prime is 51890977. The reversal of 51890942 is 24909815.

It is a junction number, because it is equal to n+sod(n) for n = 51890896 and 51890905.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62333 + ... + 63159.

It is an arithmetic number, because the mean of its divisors is an integer number (4927635).

Almost surely, 2^51890942 is an apocalyptic number.

51890942 is a deficient number, since it is larger than the sum of its proper divisors (26951218).

51890942 is a wasteful number, since it uses less digits than its factorization.

51890942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 51890942 is about 7203.5367702261. The cubic root of 51890942 is about 372.9899970244.

The spelling of 51890942 in words is "fifty-one million, eight hundred ninety thousand, nine hundred forty-two".