31330222309 has 2 divisors, whose sum is σ = 31330222310. Its totient is φ = 31330222308.

The previous prime is 31330222307. The next prime is 31330222361. The reversal of 31330222309 is 90322203313.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29336153284 + 1994069025 = 171278^2 + 44655^2 .

It is a cyclic number.

It is not a de Polignac number, because 31330222309 - 2¹ = 31330222307 is a prime.

It is a super-2 number, since 2×31330222309² (a number of 22 digits) contains 22 as substring.

Together with 31330222307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31330222307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15665111154 + 15665111155.

It is an arithmetic number, because the mean of its divisors is an integer number (15665111155).

Almost surely, 2^31330222309 is an apocalyptic number.

It is an amenable number.

31330222309 is a deficient number, since it is larger than the sum of its proper divisors (1).

31330222309 is an equidigital number, since it uses as much as digits as its factorization.

31330222309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 28.

The spelling of 31330222309 in words is "thirty-one billion, three hundred thirty million, two hundred twenty-two thousand, three hundred nine".