221132996 has 12 divisors (see below), whose sum is σ = 442266048. Its totient is φ = 94771272.

The previous prime is 221132993. The next prime is 221133061. The reversal of 221132996 is 699231122.

221132996 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (221132993) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3948776 + ... + 3948831.

It is an arithmetic number, because the mean of its divisors is an integer number (36855504).

Almost surely, 2^221132996 is an apocalyptic number.

It is an amenable number.

221132996 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221132996 is a wasteful number, since it uses less digits than its factorization.

221132996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7897618 (or 7897616 counting only the distinct ones).

The product of its digits is 11664, while the sum is 35.

The square root of 221132996 is about 14870.5412140917. The cubic root of 221132996 is about 604.7156152680.

The spelling of 221132996 in words is "two hundred twenty-one million, one hundred thirty-two thousand, nine hundred ninety-six".