221088232 has 8 divisors (see below), whose sum is σ = 414540450. Its totient is φ = 110544112.

The previous prime is 221088227. The next prime is 221088233. The reversal of 221088232 is 232880122.

221088232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 217680516 + 3407716 = 14754^2 + 1846^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 221088232.

It is not an unprimeable number, because it can be changed into a prime (221088233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13818007 + ... + 13818022.

Almost surely, 2^221088232 is an apocalyptic number.

It is an amenable number.

221088232 is a deficient number, since it is larger than the sum of its proper divisors (193452218).

221088232 is a wasteful number, since it uses less digits than its factorization.

221088232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27636035 (or 27636031 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 221088232 is about 14869.0360144833. The cubic root of 221088232 is about 604.6748082770.

The spelling of 221088232 in words is "two hundred twenty-one million, eighty-eight thousand, two hundred thirty-two".