320550331 has 4 divisors (see below), whose sum is σ = 321188112. Its totient is φ = 319912552.

The previous prime is 320550313. The next prime is 320550359. The reversal of 320550331 is 133055023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133055023 = 23 ⋅5785001.

It is a cyclic number.

It is not a de Polignac number, because 320550331 - 2⁵ = 320550299 is a prime.

It is a super-2 number, since 2×320550331² = 205505029408419122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320550031) 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, 318136 + ... + 319141.

It is an arithmetic number, because the mean of its divisors is an integer number (80297028).

Almost surely, 2^320550331 is an apocalyptic number.

320550331 is a deficient number, since it is larger than the sum of its proper divisors (637781).

320550331 is an equidigital number, since it uses as much as digits as its factorization.

320550331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637780.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 320550331 is about 17903.9194312307. The cubic root of 320550331 is about 684.3822594283.

The spelling of 320550331 in words is "three hundred twenty million, five hundred fifty thousand, three hundred thirty-one".