18215122 has 8 divisors (see below), whose sum is σ = 27342000. Its totient is φ = 9101124.

The previous prime is 18215083. The next prime is 18215159. The reversal of 18215122 is 22151281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 18215093 and 18215102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2029 + ... + 6367.

It is an arithmetic number, because the mean of its divisors is an integer number (3417750).

Almost surely, 2^18215122 is an apocalyptic number.

18215122 is a deficient number, since it is larger than the sum of its proper divisors (9126878).

18215122 is a wasteful number, since it uses less digits than its factorization.

18215122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6440.

The product of its digits is 320, while the sum is 22.

The square root of 18215122 is about 4267.9177592826. The cubic root of 18215122 is about 263.1140430777.

The spelling of 18215122 in words is "eighteen million, two hundred fifteen thousand, one hundred twenty-two".