51842218 has 16 divisors (see below), whose sum is σ = 78644520. Its totient is φ = 25629376.

The previous prime is 51842209. The next prime is 51842221. The reversal of 51842218 is 81224815.

It can be written as a sum of positive squares in 4 ways, for example, as 32455809 + 19386409 = 5697^2 + 4403^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51842218.

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, 92796 + ... + 93352.

Almost surely, 2^51842218 is an apocalyptic number.

51842218 is a deficient number, since it is larger than the sum of its proper divisors (26802302).

51842218 is a wasteful number, since it uses less digits than its factorization.

51842218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001.

The product of its digits is 5120, while the sum is 31.

The square root of 51842218 is about 7200.1540261303. The cubic root of 51842218 is about 372.8732184177.

The spelling of 51842218 in words is "fifty-one million, eight hundred forty-two thousand, two hundred eighteen".