221562156 has 24 divisors (see below), whose sum is σ = 547389360. Its totient is φ = 69509632.

The previous prime is 221562137. The next prime is 221562161. The reversal of 221562156 is 651265122.

221562156 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 542841 + ... + 543248.

It is an arithmetic number, because the mean of its divisors is an integer number (22807890).

Almost surely, 2^221562156 is an apocalyptic number.

It is an amenable number.

221562156 is an abundant number, since it is smaller than the sum of its proper divisors (325827204).

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

221562156 is a wasteful number, since it uses less digits than its factorization.

221562156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086113 (or 1086111 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 221562156 is about 14884.9640913238. The cubic root of 221562156 is about 605.1065595607.

The spelling of 221562156 in words is "two hundred twenty-one million, five hundred sixty-two thousand, one hundred fifty-six".