31112313511 has 2 divisors, whose sum is σ = 31112313512. Its totient is φ = 31112313510.

The previous prime is 31112313503. The next prime is 31112313541. The reversal of 31112313511 is 11531321113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31112313511 - 2³ = 31112313503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31112313541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556156755 + 15556156756.

It is an arithmetic number, because the mean of its divisors is an integer number (15556156756).

Almost surely, 2^31112313511 is an apocalyptic number.

31112313511 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112313511 is an equidigital number, since it uses as much as digits as its factorization.

31112313511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270, while the sum is 22.

Adding to 31112313511 its reverse (11531321113), we get a palindrome (42643634624).

The spelling of 31112313511 in words is "thirty-one billion, one hundred twelve million, three hundred thirteen thousand, five hundred eleven".