31143322097 has 2 divisors, whose sum is σ = 31143322098. Its totient is φ = 31143322096.

The previous prime is 31143322087. The next prime is 31143322117. The reversal of 31143322097 is 79022334113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26699233201 + 4444088896 = 163399^2 + 66664^2 .

It is an emirp because it is prime and its reverse (79022334113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31143322097 - 2³² = 26848354801 is a prime.

It is a super-2 number, since 2×31143322097² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31143322087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571661048 + 15571661049.

It is an arithmetic number, because the mean of its divisors is an integer number (15571661049).

Almost surely, 2^31143322097 is an apocalyptic number.

It is an amenable number.

31143322097 is a deficient number, since it is larger than the sum of its proper divisors (1).

31143322097 is an equidigital number, since it uses as much as digits as its factorization.

31143322097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 35.

The spelling of 31143322097 in words is "thirty-one billion, one hundred forty-three million, three hundred twenty-two thousand, ninety-seven".