222642636 has 24 divisors (see below), whose sum is σ = 528306240. Its totient is φ = 72956112.

The previous prime is 222642617. The next prime is 222642689. The reversal of 222642636 is 636246222.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 222642597 and 222642606.

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, 156526 + ... + 157941.

It is an arithmetic number, because the mean of its divisors is an integer number (22012760).

Almost surely, 2^222642636 is an apocalyptic number.

It is an amenable number.

222642636 is an abundant number, since it is smaller than the sum of its proper divisors (305663604).

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

222642636 is a wasteful number, since it uses less digits than its factorization.

222642636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314533 (or 314531 counting only the distinct ones).

The product of its digits is 41472, while the sum is 33.

The square root of 222642636 is about 14921.2142937497. The cubic root of 222642636 is about 606.0885949178.

Adding to 222642636 its reverse (636246222), we get a palindrome (858888858).

The spelling of 222642636 in words is "two hundred twenty-two million, six hundred forty-two thousand, six hundred thirty-six".