31122313319 has 2 divisors, whose sum is σ = 31122313320. Its totient is φ = 31122313318.

The previous prime is 31122313303. The next prime is 31122313331. The reversal of 31122313319 is 91331322113.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (91331322113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31122313319 - 2⁴ = 31122313303 is a prime.

It is a super-2 number, since 2×31122313319² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31122313291 and 31122313300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31122313819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561156659 + 15561156660.

It is an arithmetic number, because the mean of its divisors is an integer number (15561156660).

Almost surely, 2^31122313319 is an apocalyptic number.

31122313319 is a deficient number, since it is larger than the sum of its proper divisors (1).

31122313319 is an equidigital number, since it uses as much as digits as its factorization.

31122313319 is an evil number, because the sum of its binary digits is even.

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

The spelling of 31122313319 in words is "thirty-one billion, one hundred twenty-two million, three hundred thirteen thousand, three hundred nineteen".