1131312263 has 2 divisors, whose sum is σ = 1131312264. Its totient is φ = 1131312262.

The previous prime is 1131312253. The next prime is 1131312319. The reversal of 1131312263 is 3622131311.

It is a weak prime.

It is an emirp because it is prime and its reverse (3622131311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131312263 - 2¹⁰ = 1131311239 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131312253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565656131 + 565656132.

It is an arithmetic number, because the mean of its divisors is an integer number (565656132).

Almost surely, 2^1131312263 is an apocalyptic number.

1131312263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131312263 is an equidigital number, since it uses as much as digits as its factorization.

1131312263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 1131312263 is about 33634.9856994172. The cubic root of 1131312263 is about 1041.9834752753.

Adding to 1131312263 its reverse (3622131311), we get a palindrome (4753443574).

The spelling of 1131312263 in words is "one billion, one hundred thirty-one million, three hundred twelve thousand, two hundred sixty-three".