31000022333209 has 2 divisors, whose sum is σ = 31000022333210. Its totient is φ = 31000022333208.

The previous prime is 31000022333191. The next prime is 31000022333233. The reversal of 31000022333209 is 90233322000013.

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., 30901680509184 + 98341824025 = 5558928^2 + 313595^2 .

It is a cyclic number.

It is not a de Polignac number, because 31000022333209 - 2⁷ = 31000022333081 is a prime.

It is a super-2 number, since 2×31000022333209² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31000022333309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15500011166604 + 15500011166605.

It is an arithmetic number, because the mean of its divisors is an integer number (15500011166605).

Almost surely, 2^{31000022333209} is an apocalyptic number.

It is an amenable number.

31000022333209 is a deficient number, since it is larger than the sum of its proper divisors (1).

31000022333209 is an equidigital number, since it uses as much as digits as its factorization.

31000022333209 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 31000022333209 in words is "thirty-one trillion, twenty-two million, three hundred thirty-three thousand, two hundred nine".