311241263 has 2 divisors, whose sum is σ = 311241264. Its totient is φ = 311241262.

The previous prime is 311241239. The next prime is 311241269. The reversal of 311241263 is 362142113.

It is a strong prime.

It is an emirp because it is prime and its reverse (362142113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311241263 - 2²² = 307046959 is a prime.

It is a super-2 number, since 2×311241263² = 193742247587670338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311241269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155620631 + 155620632.

It is an arithmetic number, because the mean of its divisors is an integer number (155620632).

Almost surely, 2^311241263 is an apocalyptic number.

311241263 is a deficient number, since it is larger than the sum of its proper divisors (1).

311241263 is an equidigital number, since it uses as much as digits as its factorization.

311241263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 311241263 is about 17642.0311472347. The cubic root of 311241263 is about 677.6920479691.

Adding to 311241263 its reverse (362142113), we get a palindrome (673383376).

The spelling of 311241263 in words is "three hundred eleven million, two hundred forty-one thousand, two hundred sixty-three".