2311220231 has 2 divisors, whose sum is σ = 2311220232. Its totient is φ = 2311220230.

The previous prime is 2311220213. The next prime is 2311220239. The reversal of 2311220231 is 1320221132.

Together with previous prime (2311220213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2311220231 - 2¹⁴ = 2311203847 is a prime.

It is a super-2 number, since 2×2311220231² = 10683477912367386722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2311220239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155610115 + 1155610116.

It is an arithmetic number, because the mean of its divisors is an integer number (1155610116).

Almost surely, 2^2311220231 is an apocalyptic number.

2311220231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311220231 is an equidigital number, since it uses as much as digits as its factorization.

2311220231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2311220231 is about 48075.1519082363. The cubic root of 2311220231 is about 1322.1491297043.

Adding to 2311220231 its reverse (1320221132), we get a palindrome (3631441363).

Subtracting from 2311220231 its reverse (1320221132), we obtain a palindrome (990999099).

The spelling of 2311220231 in words is "two billion, three hundred eleven million, two hundred twenty thousand, two hundred thirty-one".