221490322 has 32 divisors (see below), whose sum is σ = 356762880. Its totient is φ = 102896640.

The previous prime is 221490317. The next prime is 221490337. The reversal of 221490322 is 223094122.

221490322 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 15 ways as a sum of consecutive naturals, for example, 237954 + ... + 238882.

It is an arithmetic number, because the mean of its divisors is an integer number (11148840).

Almost surely, 2^221490322 is an apocalyptic number.

221490322 is a deficient number, since it is larger than the sum of its proper divisors (135272558).

221490322 is a wasteful number, since it uses less digits than its factorization.

221490322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 221490322 is about 14882.5509238168. The cubic root of 221490322 is about 605.0411574122.

The spelling of 221490322 in words is "two hundred twenty-one million, four hundred ninety thousand, three hundred twenty-two".