221312332 has 12 divisors (see below), whose sum is σ = 387490936. Its totient is φ = 110600640.

The previous prime is 221312303. The next prime is 221312353. The reversal of 221312332 is 233213122.

221312332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 4158 + ... + 21445.

Almost surely, 2^221312332 is an apocalyptic number.

It is an amenable number.

221312332 is a deficient number, since it is larger than the sum of its proper divisors (166178604).

221312332 is a wasteful number, since it uses less digits than its factorization.

221312332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27768 (or 27766 counting only the distinct ones).

The product of its digits is 432, while the sum is 19.

The square root of 221312332 is about 14876.5699003500. The cubic root of 221312332 is about 604.8790432779.

Adding to 221312332 its reverse (233213122), we get a palindrome (454525454).

The spelling of 221312332 in words is "two hundred twenty-one million, three hundred twelve thousand, three hundred thirty-two".