323220431 has 2 divisors, whose sum is σ = 323220432. Its totient is φ = 323220430.

The previous prime is 323220427. The next prime is 323220451. The reversal of 323220431 is 134022323.

It is an a-pointer prime, because the next prime (323220451) can be obtained adding 323220431 to its sum of digits (20).

It is a weak prime.

It is an emirp because it is prime and its reverse (134022323) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 323220431 - 2² = 323220427 is a prime.

It is a super-2 number, since 2×323220431² = 208942894031651522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (323220451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161610215 + 161610216.

It is an arithmetic number, because the mean of its divisors is an integer number (161610216).

Almost surely, 2^323220431 is an apocalyptic number.

323220431 is a deficient number, since it is larger than the sum of its proper divisors (1).

323220431 is an equidigital number, since it uses as much as digits as its factorization.

323220431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 323220431 is about 17978.3322641451. The cubic root of 323220431 is about 686.2772489824.

Adding to 323220431 its reverse (134022323), we get a palindrome (457242754).

The spelling of 323220431 in words is "three hundred twenty-three million, two hundred twenty thousand, four hundred thirty-one".