221122152 has 48 divisors (see below), whose sum is σ = 630396000. Its totient is φ = 69827616.

The previous prime is 221122141. The next prime is 221122157. The reversal of 221122152 is 251221122.

It is a super-2 number, since 2×221122152² = 97790012210222208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221122157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79452 + ... + 82187.

It is an arithmetic number, because the mean of its divisors is an integer number (13133250).

Almost surely, 2^221122152 is an apocalyptic number.

It is an amenable number.

221122152 is an abundant number, since it is smaller than the sum of its proper divisors (409273848).

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

221122152 is a wasteful number, since it uses less digits than its factorization.

221122152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161670 (or 161663 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 221122152 is about 14870.1765961269. The cubic root of 221122152 is about 604.7057303520.

Adding to 221122152 its reverse (251221122), we get a palindrome (472343274).

The spelling of 221122152 in words is "two hundred twenty-one million, one hundred twenty-two thousand, one hundred fifty-two".