31313040024209 has 2 divisors, whose sum is σ = 31313040024210. Its totient is φ = 31313040024208.

The previous prime is 31313040024199. The next prime is 31313040024241. The reversal of 31313040024209 is 90242004031313.

It is an a-pointer prime, because the next prime (31313040024241) can be obtained adding 31313040024209 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31295386915984 + 17653108225 = 5594228^2 + 132865^2 .

It is a cyclic number.

It is not a de Polignac number, because 31313040024209 - 2²⁸ = 31312771588753 is a prime.

It is not a weakly prime, because it can be changed into another prime (31313040024809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656520012104 + 15656520012105.

It is an arithmetic number, because the mean of its divisors is an integer number (15656520012105).

Almost surely, 2^{31313040024209} is an apocalyptic number.

It is an amenable number.

31313040024209 is a deficient number, since it is larger than the sum of its proper divisors (1).

31313040024209 is an equidigital number, since it uses as much as digits as its factorization.

31313040024209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 31313040024209 in words is "thirty-one trillion, three hundred thirteen billion, forty million, twenty-four thousand, two hundred nine".