51489418 has 16 divisors (see below), whose sum is σ = 79054560. Its totient is φ = 25143696.

The previous prime is 51489397. The next prime is 51489421. The reversal of 51489418 is 81498415.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17896 + ... + 20572.

It is an arithmetic number, because the mean of its divisors is an integer number (4940910).

Almost surely, 2^51489418 is an apocalyptic number.

51489418 is a deficient number, since it is larger than the sum of its proper divisors (27565142).

51489418 is a wasteful number, since it uses less digits than its factorization.

51489418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901.

The product of its digits is 46080, while the sum is 40.

The square root of 51489418 is about 7175.6127264506. The cubic root of 51489418 is about 372.0254588118.

The spelling of 51489418 in words is "fifty-one million, four hundred eighty-nine thousand, four hundred eighteen".