221100232 has 32 divisors (see below), whose sum is σ = 439759800. Its totient is φ = 103855104.

The previous prime is 221100227. The next prime is 221100233. The reversal of 221100232 is 232001122.

221100232 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 4 ways, for example, as 158911236 + 62188996 = 12606^2 + 7886^2 .

It is not an unprimeable number, because it can be changed into a prime (221100233) 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, 95278 + ... + 97570.

Almost surely, 2^221100232 is an apocalyptic number.

It is an amenable number.

221100232 is a deficient number, since it is larger than the sum of its proper divisors (218659568).

221100232 is a wasteful number, since it uses less digits than its factorization.

221100232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025 (or 3021 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 221100232 is about 14869.4395321411. The cubic root of 221100232 is about 604.6857480518.

Adding to 221100232 its reverse (232001122), we get a palindrome (453101354).

The spelling of 221100232 in words is "two hundred twenty-one million, one hundred thousand, two hundred thirty-two".