329912221 has 16 divisors (see below), whose sum is σ = 342171648. Its totient is φ = 317948400.

The previous prime is 329912189. The next prime is 329912249. The reversal of 329912221 is 122219923.

It is a cyclic number.

It is not a de Polignac number, because 329912221 - 2⁵ = 329912189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (329912291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1060656 + ... + 1060966.

It is an arithmetic number, because the mean of its divisors is an integer number (21385728).

Almost surely, 2^329912221 is an apocalyptic number.

It is an amenable number.

329912221 is a deficient number, since it is larger than the sum of its proper divisors (12259427).

329912221 is a wasteful number, since it uses less digits than its factorization.

329912221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672.

The product of its digits is 3888, while the sum is 31.

The square root of 329912221 is about 18163.4859264404. The cubic root of 329912221 is about 690.9810458463.

The spelling of 329912221 in words is "three hundred twenty-nine million, nine hundred twelve thousand, two hundred twenty-one".