31118504423 has 2 divisors, whose sum is σ = 31118504424. Its totient is φ = 31118504422.

The previous prime is 31118504377. The next prime is 31118504441. The reversal of 31118504423 is 32440581113.

It is a strong prime.

It is an emirp because it is prime and its reverse (32440581113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31118504423 - 2⁶ = 31118504359 is a prime.

It is a super-2 number, since 2×31118504423² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31118504423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31118504453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15559252211 + 15559252212.

It is an arithmetic number, because the mean of its divisors is an integer number (15559252212).

Almost surely, 2^31118504423 is an apocalyptic number.

31118504423 is a deficient number, since it is larger than the sum of its proper divisors (1).

31118504423 is an equidigital number, since it uses as much as digits as its factorization.

31118504423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 31118504423 in words is "thirty-one billion, one hundred eighteen million, five hundred four thousand, four hundred twenty-three".