51985194 has 16 divisors (see below), whose sum is σ = 106388832. Its totient is φ = 16925328.

The previous prime is 51985163. The next prime is 51985207. The reversal of 51985194 is 49158915.

51985194 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon 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, 100489 + ... + 101004.

It is an arithmetic number, because the mean of its divisors is an integer number (6649302).

Almost surely, 2^51985194 is an apocalyptic number.

51985194 is an abundant number, since it is smaller than the sum of its proper divisors (54403638).

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

51985194 is a wasteful number, since it uses less digits than its factorization.

51985194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201541.

The product of its digits is 64800, while the sum is 42.

The square root of 51985194 is about 7210.0758664524. The cubic root of 51985194 is about 373.2156869599.

The spelling of 51985194 in words is "fifty-one million, nine hundred eighty-five thousand, one hundred ninety-four".