11431431287 has 2 divisors, whose sum is σ = 11431431288. Its totient is φ = 11431431286.

The previous prime is 11431431281. The next prime is 11431431289. The reversal of 11431431287 is 78213413411.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11431431287 - 2⁶ = 11431431223 is a prime.

Together with 11431431289, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11431431281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5715715643 + 5715715644.

It is an arithmetic number, because the mean of its divisors is an integer number (5715715644).

Almost surely, 2^11431431287 is an apocalyptic number.

11431431287 is a deficient number, since it is larger than the sum of its proper divisors (1).

11431431287 is an equidigital number, since it uses as much as digits as its factorization.

11431431287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

Adding to 11431431287 its reverse (78213413411), we get a palindrome (89644844698).

The spelling of 11431431287 in words is "eleven billion, four hundred thirty-one million, four hundred thirty-one thousand, two hundred eighty-seven".