221222252 has 6 divisors (see below), whose sum is σ = 387138948. Its totient is φ = 110611124.

The previous prime is 221222251. The next prime is 221222269. The reversal of 221222252 is 252222122.

It is not an unprimeable number, because it can be changed into a prime (221222251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27652778 + ... + 27652785.

It is an arithmetic number, because the mean of its divisors is an integer number (64523158).

Almost surely, 2^221222252 is an apocalyptic number.

It is an amenable number.

221222252 is a deficient number, since it is larger than the sum of its proper divisors (165916696).

221222252 is a wasteful number, since it uses less digits than its factorization.

221222252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55305567 (or 55305565 counting only the distinct ones).

The product of its digits is 640, while the sum is 20.

The square root of 221222252 is about 14873.5420125806. The cubic root of 221222252 is about 604.7969648595.

Adding to 221222252 its reverse (252222122), we get a palindrome (473444374).

The spelling of 221222252 in words is "two hundred twenty-one million, two hundred twenty-two thousand, two hundred fifty-two".