31012743317 has 2 divisors, whose sum is σ = 31012743318. Its totient is φ = 31012743316.

The previous prime is 31012743161. The next prime is 31012743337. The reversal of 31012743317 is 71334721013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16210127761 + 14802615556 = 127319^2 + 121666^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012743317 - 2⁸ = 31012743061 is a prime.

It is a super-2 number, since 2×31012743317² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31012743337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506371658 + 15506371659.

It is an arithmetic number, because the mean of its divisors is an integer number (15506371659).

Almost surely, 2^31012743317 is an apocalyptic number.

It is an amenable number.

31012743317 is a deficient number, since it is larger than the sum of its proper divisors (1).

31012743317 is an equidigital number, since it uses as much as digits as its factorization.

31012743317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 32.

The spelling of 31012743317 in words is "thirty-one billion, twelve million, seven hundred forty-three thousand, three hundred seventeen".