31312102219 has 2 divisors, whose sum is σ = 31312102220. Its totient is φ = 31312102218.

The previous prime is 31312102177. The next prime is 31312102229. The reversal of 31312102219 is 91220121313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31312102219 - 2²³ = 31303713611 is a prime.

It is a super-2 number, since 2×31312102219² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31312102193 and 31312102202.

It is not a weakly prime, because it can be changed into another prime (31312102229) 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, 15656051109 + 15656051110.

It is an arithmetic number, because the mean of its divisors is an integer number (15656051110).

Almost surely, 2^31312102219 is an apocalyptic number.

31312102219 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312102219 is an equidigital number, since it uses as much as digits as its factorization.

31312102219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 31312102219 in words is "thirty-one billion, three hundred twelve million, one hundred two thousand, two hundred nineteen".