31312011403 has 2 divisors, whose sum is σ = 31312011404. Its totient is φ = 31312011402.

The previous prime is 31312011397. The next prime is 31312011413. The reversal of 31312011403 is 30411021313.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31312011403 is a prime.

It is not a weakly prime, because it can be changed into another prime (31312011413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656005701 + 15656005702.

It is an arithmetic number, because the mean of its divisors is an integer number (15656005702).

Almost surely, 2^31312011403 is an apocalyptic number.

31312011403 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312011403 is an equidigital number, since it uses as much as digits as its factorization.

31312011403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31312011403 its reverse (30411021313), we get a palindrome (61723032716).

The spelling of 31312011403 in words is "thirty-one billion, three hundred twelve million, eleven thousand, four hundred three".