2311213231 has 2 divisors, whose sum is σ = 2311213232. Its totient is φ = 2311213230.

The previous prime is 2311213207. The next prime is 2311213237. The reversal of 2311213231 is 1323121132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2311213231 - 2²¹ = 2309116079 is a prime.

It is a super-2 number, since 2×2311213231² = 10683413198298918722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2311213199 and 2311213208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2311213237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155606615 + 1155606616.

It is an arithmetic number, because the mean of its divisors is an integer number (1155606616).

Almost surely, 2^2311213231 is an apocalyptic number.

2311213231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311213231 is an equidigital number, since it uses as much as digits as its factorization.

2311213231 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 2311213231 is about 48075.0791054991. The cubic root of 2311213231 is about 1322.1477949038.

Adding to 2311213231 its reverse (1323121132), we get a palindrome (3634334363).

The spelling of 2311213231 in words is "two billion, three hundred eleven million, two hundred thirteen thousand, two hundred thirty-one".