22118722 has 8 divisors (see below), whose sum is σ = 33722172. Its totient is φ = 10878000.

The previous prime is 22118713. The next prime is 22118729. The reversal of 22118722 is 22781122.

It can be written as a sum of positive squares in 2 ways, for example, as 22099401 + 19321 = 4701^2 + 139^2 .

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

It is not an unprimeable number, because it can be changed into a prime (22118729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90529 + ... + 90772.

Almost surely, 2^22118722 is an apocalyptic number.

22118722 is a deficient number, since it is larger than the sum of its proper divisors (11603450).

22118722 is a wasteful number, since it uses less digits than its factorization.

22118722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181364.

The product of its digits is 896, while the sum is 25.

The square root of 22118722 is about 4703.0545393393. The cubic root of 22118722 is about 280.7070650344.

Adding to 22118722 its reverse (22781122), we get a palindrome (44899844).

The spelling of 22118722 in words is "twenty-two million, one hundred eighteen thousand, seven hundred twenty-two".