22272818 has 16 divisors (see below), whose sum is σ = 34732800. Its totient is φ = 10700400.

The previous prime is 22272797. The next prime is 22272821. The reversal of 22272818 is 81827222.

It is a super-2 number, since 2×22272818² = 992156843322248, which contains 22 as substring.

It is a Curzon 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, 8033 + ... + 10443.

It is an arithmetic number, because the mean of its divisors is an integer number (2170800).

Almost surely, 2^22272818 is an apocalyptic number.

22272818 is a deficient number, since it is larger than the sum of its proper divisors (12459982).

22272818 is a wasteful number, since it uses less digits than its factorization.

22272818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593.

The product of its digits is 7168, while the sum is 32.

The square root of 22272818 is about 4719.4086493967. The cubic root of 22272818 is about 281.3574306955.

The spelling of 22272818 in words is "twenty-two million, two hundred seventy-two thousand, eight hundred eighteen".