320535331 has 2 divisors, whose sum is σ = 320535332. Its totient is φ = 320535330.

The previous prime is 320535307. The next prime is 320535353. The reversal of 320535331 is 133535023.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (133535023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320535331 - 2⁷ = 320535203 is a prime.

It is a super-2 number, since 2×320535331² = 205485796838559122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320535296 and 320535305.

It is not a weakly prime, because it can be changed into another prime (320535931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160267665 + 160267666.

It is an arithmetic number, because the mean of its divisors is an integer number (160267666).

Almost surely, 2^320535331 is an apocalyptic number.

320535331 is a deficient number, since it is larger than the sum of its proper divisors (1).

320535331 is an equidigital number, since it uses as much as digits as its factorization.

320535331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 25.

The square root of 320535331 is about 17903.5005236406. The cubic root of 320535331 is about 684.3715841479.

The spelling of 320535331 in words is "three hundred twenty million, five hundred thirty-five thousand, three hundred thirty-one".