22115660 has 36 divisors (see below), whose sum is σ = 54027792. Its totient is φ = 7582176.

The previous prime is 22115651. The next prime is 22115663. The reversal of 22115660 is 6651122.

It is not an unprimeable number, because it can be changed into a prime (22115663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10304 + ... + 12263.

It is an arithmetic number, because the mean of its divisors is an integer number (1500772).

Almost surely, 2^22115660 is an apocalyptic number.

22115660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22115660 is an abundant number, since it is smaller than the sum of its proper divisors (31912132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22115660 is a wasteful number, since it uses less digits than its factorization.

22115660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22590 (or 22581 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 22115660 is about 4702.7289949560. The cubic root of 22115660 is about 280.6941112315.

Adding to 22115660 its reverse (6651122), we get a palindrome (28766782).

The spelling of 22115660 in words is "twenty-two million, one hundred fifteen thousand, six hundred sixty".