320253321 has 4 divisors (see below), whose sum is σ = 427004432. Its totient is φ = 213502212.

The previous prime is 320253319. The next prime is 320253331. The reversal of 320253321 is 123352023.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123352023 = 3 ⋅41117341.

It is not a de Polignac number, because 320253321 - 2¹ = 320253319 is a prime.

It is a super-2 number, since 2×320253321² = 205124379223058082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320253331) 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, 53375551 + ... + 53375556.

It is an arithmetic number, because the mean of its divisors is an integer number (106751108).

Almost surely, 2^320253321 is an apocalyptic number.

It is an amenable number.

320253321 is a deficient number, since it is larger than the sum of its proper divisors (106751111).

320253321 is a wasteful number, since it uses less digits than its factorization.

320253321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106751110.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 320253321 is about 17895.6229564662. The cubic root of 320253321 is about 684.1708197386.

The spelling of 320253321 in words is "three hundred twenty million, two hundred fifty-three thousand, three hundred twenty-one".