329133221 has 2 divisors, whose sum is σ = 329133222. Its totient is φ = 329133220.

The previous prime is 329133193. The next prime is 329133229. The reversal of 329133221 is 122331923.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259660996 + 69472225 = 16114^2 + 8335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-329133221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (329133229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164566610 + 164566611.

It is an arithmetic number, because the mean of its divisors is an integer number (164566611).

Almost surely, 2^329133221 is an apocalyptic number.

It is an amenable number.

329133221 is a deficient number, since it is larger than the sum of its proper divisors (1).

329133221 is an equidigital number, since it uses as much as digits as its factorization.

329133221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 26.

The square root of 329133221 is about 18142.0291312742. The cubic root of 329133221 is about 690.4367612145.

The spelling of 329133221 in words is "three hundred twenty-nine million, one hundred thirty-three thousand, two hundred twenty-one".