51889618 has 16 divisors (see below), whose sum is σ = 85022784. Its totient is φ = 23554960.

The previous prime is 51889561. The next prime is 51889631. The reversal of 51889618 is 81698815.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27171 + ... + 29017.

It is an arithmetic number, because the mean of its divisors is an integer number (5313924).

Almost surely, 2^51889618 is an apocalyptic number.

51889618 is a deficient number, since it is larger than the sum of its proper divisors (33133166).

51889618 is a wasteful number, since it uses less digits than its factorization.

51889618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3137.

The product of its digits is 138240, while the sum is 46.

The square root of 51889618 is about 7203.4448703381. Note that the first 3 decimals coincide. The cubic root of 51889618 is about 372.9868247113.

The spelling of 51889618 in words is "fifty-one million, eight hundred eighty-nine thousand, six hundred eighteen".