221542112 has 24 divisors (see below), whose sum is σ = 475812792. Its totient is φ = 100700800.

The previous prime is 221542103. The next prime is 221542163. The reversal of 221542112 is 211245122.

221542112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314339 + ... + 315042.

It is an arithmetic number, because the mean of its divisors is an integer number (19825533).

Almost surely, 2^221542112 is an apocalyptic number.

221542112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221542112 is an abundant number, since it is smaller than the sum of its proper divisors (254270680).

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

221542112 is a wasteful number, since it uses less digits than its factorization.

221542112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629402 (or 629394 counting only the distinct ones).

The product of its digits is 320, while the sum is 20.

The square root of 221542112 is about 14884.2907792075. The cubic root of 221542112 is about 605.0883116765.

Adding to 221542112 its reverse (211245122), we get a palindrome (432787234).

The spelling of 221542112 in words is "two hundred twenty-one million, five hundred forty-two thousand, one hundred twelve".