320452221 has 4 divisors (see below), whose sum is σ = 427269632. Its totient is φ = 213634812.

The previous prime is 320452219. The next prime is 320452247. The reversal of 320452221 is 122254023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 320452221 - 2¹ = 320452219 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320451221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53408701 + ... + 53408706.

It is an arithmetic number, because the mean of its divisors is an integer number (106817408).

Almost surely, 2^320452221 is an apocalyptic number.

It is an amenable number.

320452221 is a deficient number, since it is larger than the sum of its proper divisors (106817411).

320452221 is a wasteful number, since it uses less digits than its factorization.

320452221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106817410.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 320452221 is about 17901.1793186929. The cubic root of 320452221 is about 684.3124299419.

The spelling of 320452221 in words is "three hundred twenty million, four hundred fifty-two thousand, two hundred twenty-one".