221156264 has 32 divisors (see below), whose sum is σ = 501785280. Its totient is φ = 89205504.

The previous prime is 221156251. The next prime is 221156269. The reversal of 221156264 is 462651122.

221156264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221156269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115202 + ... + 117105.

It is an arithmetic number, because the mean of its divisors is an integer number (15680790).

Almost surely, 2^221156264 is an apocalyptic number.

It is an amenable number.

221156264 is an abundant number, since it is smaller than the sum of its proper divisors (280629016).

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

221156264 is a wasteful number, since it uses less digits than its factorization.

221156264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232337 (or 232333 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 221156264 is about 14871.3235456700. The cubic root of 221156264 is about 604.7368242685.

The spelling of 221156264 in words is "two hundred twenty-one million, one hundred fifty-six thousand, two hundred sixty-four".