320253221 has 4 divisors (see below), whose sum is σ = 320347500. Its totient is φ = 320158944.

The previous prime is 320253181. The next prime is 320253229. The reversal of 320253221 is 122352023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134884996 + 185368225 = 11614^2 + 13615^2 .

It is a cyclic number.

It is not a de Polignac number, because 320253221 - 2¹⁰ = 320252197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320253193 and 320253202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320253229) 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, 41846 + ... + 48903.

It is an arithmetic number, because the mean of its divisors is an integer number (80086875).

Almost surely, 2^320253221 is an apocalyptic number.

It is an amenable number.

320253221 is a deficient number, since it is larger than the sum of its proper divisors (94279).

320253221 is an equidigital number, since it uses as much as digits as its factorization.

320253221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94278.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 320253221 is about 17895.6201624867. The cubic root of 320253221 is about 684.1707485272.

The spelling of 320253221 in words is "three hundred twenty million, two hundred fifty-three thousand, two hundred twenty-one".