1320323231 has 2 divisors, whose sum is σ = 1320323232. Its totient is φ = 1320323230.

The previous prime is 1320323219. The next prime is 1320323261. The reversal of 1320323231 is 1323230231.

It is a weak prime.

It is an emirp because it is prime and its reverse (1323230231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1320323231 - 2³⁰ = 246581407 is a prime.

It is a super-2 number, since 2×1320323231² = 3486506868636558722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320323261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660161615 + 660161616.

It is an arithmetic number, because the mean of its divisors is an integer number (660161616).

Almost surely, 2^1320323231 is an apocalyptic number.

1320323231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320323231 is an equidigital number, since it uses as much as digits as its factorization.

1320323231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1320323231 is about 36336.2522971206. The cubic root of 1320323231 is about 1097.0508415380.

Adding to 1320323231 its reverse (1323230231), we get a palindrome (2643553462).

The spelling of 1320323231 in words is "one billion, three hundred twenty million, three hundred twenty-three thousand, two hundred thirty-one".