51718894 has 16 divisors (see below), whose sum is σ = 80324928. Its totient is φ = 24959232.

The previous prime is 51718873. The next prime is 51718903. The reversal of 51718894 is 49881715.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51718894.

It is a congruent number.

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, 3094 + ... + 10630.

It is an arithmetic number, because the mean of its divisors is an integer number (5020308).

Almost surely, 2^51718894 is an apocalyptic number.

51718894 is a deficient number, since it is larger than the sum of its proper divisors (28606034).

51718894 is a wasteful number, since it uses less digits than its factorization.

51718894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7659.

The product of its digits is 80640, while the sum is 43.

The square root of 51718894 is about 7191.5849435295. The cubic root of 51718894 is about 372.5773159033.

The spelling of 51718894 in words is "fifty-one million, seven hundred eighteen thousand, eight hundred ninety-four".