311413231 has 2 divisors, whose sum is σ = 311413232. Its totient is φ = 311413230.

The previous prime is 311413183. The next prime is 311413241. The reversal of 311413231 is 132314113.

It is a strong prime.

It is an emirp because it is prime and its reverse (132314113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311413231 - 2⁷ = 311413103 is a prime.

It is a super-2 number, since 2×311413231² = 193956400883718722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311413199 and 311413208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311413241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155706615 + 155706616.

It is an arithmetic number, because the mean of its divisors is an integer number (155706616).

Almost surely, 2^311413231 is an apocalyptic number.

311413231 is a deficient number, since it is larger than the sum of its proper divisors (1).

311413231 is an equidigital number, since it uses as much as digits as its factorization.

311413231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 311413231 is about 17646.9042894214. The cubic root of 311413231 is about 677.8168385015.

Adding to 311413231 its reverse (132314113), we get a palindrome (443727344).

The spelling of 311413231 in words is "three hundred eleven million, four hundred thirteen thousand, two hundred thirty-one".