31223311319 has 2 divisors, whose sum is σ = 31223311320. Its totient is φ = 31223311318.

The previous prime is 31223311309. The next prime is 31223311333. The reversal of 31223311319 is 91311332213.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (91311332213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31223311319 is a prime.

It is a super-2 number, since 2×31223311319² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31223311291 and 31223311300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31223311309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611655659 + 15611655660.

It is an arithmetic number, because the mean of its divisors is an integer number (15611655660).

Almost surely, 2^31223311319 is an apocalyptic number.

31223311319 is a deficient number, since it is larger than the sum of its proper divisors (1).

31223311319 is an equidigital number, since it uses as much as digits as its factorization.

31223311319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916, while the sum is 29.

The spelling of 31223311319 in words is "thirty-one billion, two hundred twenty-three million, three hundred eleven thousand, three hundred nineteen".