221332996 has 12 divisors (see below), whose sum is σ = 410117148. Its totient is φ = 104156672.

The previous prime is 221332981. The next prime is 221332999. The reversal of 221332996 is 699233122.

It can be written as a sum of positive squares in 2 ways, for example, as 199374400 + 21958596 = 14120^2 + 4686^2 .

It is not an unprimeable number, because it can be changed into a prime (221332999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1627381 + ... + 1627516.

It is an arithmetic number, because the mean of its divisors is an integer number (34176429).

Almost surely, 2^221332996 is an apocalyptic number.

It is an amenable number.

221332996 is a deficient number, since it is larger than the sum of its proper divisors (188784152).

221332996 is a wasteful number, since it uses less digits than its factorization.

221332996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3254918 (or 3254916 counting only the distinct ones).

The product of its digits is 34992, while the sum is 37.

The square root of 221332996 is about 14877.2643990755. The cubic root of 221332996 is about 604.8978686056.

The spelling of 221332996 in words is "two hundred twenty-one million, three hundred thirty-two thousand, nine hundred ninety-six".