11143262231 has 2 divisors, whose sum is σ = 11143262232. Its totient is φ = 11143262230.

The previous prime is 11143262227. The next prime is 11143262233. The reversal of 11143262231 is 13226234111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11143262231 - 2² = 11143262227 is a prime.

It is a super-2 number, since 2×11143262231² (a number of 21 digits) contains 22 as substring.

Together with 11143262233, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11143262231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11143262233) 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, 5571631115 + 5571631116.

It is an arithmetic number, because the mean of its divisors is an integer number (5571631116).

Almost surely, 2^11143262231 is an apocalyptic number.

11143262231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11143262231 is an equidigital number, since it uses as much as digits as its factorization.

11143262231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

Adding to 11143262231 its reverse (13226234111), we get a palindrome (24369496342).

The spelling of 11143262231 in words is "eleven billion, one hundred forty-three million, two hundred sixty-two thousand, two hundred thirty-one".