16222918 has 4 divisors (see below), whose sum is σ = 24334380. Its totient is φ = 8111458.

The previous prime is 16222907. The next prime is 16222939. The reversal of 16222918 is 81922261.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 16222918.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4055728 + ... + 4055731.

It is an arithmetic number, because the mean of its divisors is an integer number (6083595).

Almost surely, 2^16222918 is an apocalyptic number.

16222918 is a deficient number, since it is larger than the sum of its proper divisors (8111462).

16222918 is an equidigital number, since it uses as much as digits as its factorization.

16222918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8111461.

The product of its digits is 3456, while the sum is 31.

The square root of 16222918 is about 4027.7683647400. The cubic root of 16222918 is about 253.1490630581.

The spelling of 16222918 in words is "sixteen million, two hundred twenty-two thousand, nine hundred eighteen".