221110252 has 24 divisors (see below), whose sum is σ = 423118080. Its totient is φ = 100266960.

The previous prime is 221110237. The next prime is 221110271. The reversal of 221110252 is 252011122.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13593 + ... + 25039.

It is an arithmetic number, because the mean of its divisors is an integer number (17629920).

Almost surely, 2^221110252 is an apocalyptic number.

221110252 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221110252 is a deficient number, since it is larger than the sum of its proper divisors (202007828).

221110252 is a wasteful number, since it uses less digits than its factorization.

221110252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11901 (or 11899 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 221110252 is about 14869.7764609963. The cubic root of 221110252 is about 604.6948824606.

Adding to 221110252 its reverse (252011122), we get a palindrome (473121374).

The spelling of 221110252 in words is "two hundred twenty-one million, one hundred ten thousand, two hundred fifty-two".