221351332 has 24 divisors (see below), whose sum is σ = 390662496. Its totient is φ = 109738368.

The previous prime is 221351329. The next prime is 221351359. The reversal of 221351332 is 233153122.

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, 392883 + ... + 393445.

It is an arithmetic number, because the mean of its divisors is an integer number (16277604).

Almost surely, 2^221351332 is an apocalyptic number.

It is an amenable number.

221351332 is a deficient number, since it is larger than the sum of its proper divisors (169311164).

221351332 is a wasteful number, since it uses less digits than its factorization.

221351332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227 (or 1225 counting only the distinct ones).

The product of its digits is 1080, while the sum is 22.

The square root of 221351332 is about 14877.8806286379. The cubic root of 221351332 is about 604.9145720965.

The spelling of 221351332 in words is "two hundred twenty-one million, three hundred fifty-one thousand, three hundred thirty-two".