222211660 has 36 divisors (see below), whose sum is σ = 512928864. Its totient is φ = 80803360.

The previous prime is 222211657. The next prime is 222211673. The reversal of 222211660 is 66112222.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43492 + ... + 48331.

It is an arithmetic number, because the mean of its divisors is an integer number (14248024).

Almost surely, 2^222211660 is an apocalyptic number.

222211660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222211660 is an abundant number, since it is smaller than the sum of its proper divisors (290717204).

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

222211660 is a wasteful number, since it uses less digits than its factorization.

222211660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91854 (or 91841 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 222211660 is about 14906.7655780857. The cubic root of 222211660 is about 605.6972677096.

Adding to 222211660 its reverse (66112222), we get a palindrome (288323882).

The spelling of 222211660 in words is "two hundred twenty-two million, two hundred eleven thousand, six hundred sixty".