11312013431 has 2 divisors, whose sum is σ = 11312013432. Its totient is φ = 11312013430.

The previous prime is 11312013421. The next prime is 11312013481. The reversal of 11312013431 is 13431021311.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11312013431 is a prime.

It is a super-2 number, since 2×11312013431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11312013421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5656006715 + 5656006716.

It is an arithmetic number, because the mean of its divisors is an integer number (5656006716).

Almost surely, 2^11312013431 is an apocalyptic number.

11312013431 is a deficient number, since it is larger than the sum of its proper divisors (1).

11312013431 is an equidigital number, since it uses as much as digits as its factorization.

11312013431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 11312013431 its reverse (13431021311), we get a palindrome (24743034742).

The spelling of 11312013431 in words is "eleven billion, three hundred twelve million, thirteen thousand, four hundred thirty-one".