31143140713 has 2 divisors, whose sum is σ = 31143140714. Its totient is φ = 31143140712.

The previous prime is 31143140689. The next prime is 31143140767. The reversal of 31143140713 is 31704134113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26130075904 + 5013064809 = 161648^2 + 70803^2 .

It is an emirp because it is prime and its reverse (31704134113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31143140713 - 2¹³ = 31143132521 is a prime.

It is not a weakly prime, because it can be changed into another prime (31143140213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571570356 + 15571570357.

It is an arithmetic number, because the mean of its divisors is an integer number (15571570357).

Almost surely, 2^31143140713 is an apocalyptic number.

It is an amenable number.

31143140713 is a deficient number, since it is larger than the sum of its proper divisors (1).

31143140713 is an equidigital number, since it uses as much as digits as its factorization.

31143140713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 31143140713 its reverse (31704134113), we get a palindrome (62847274826).

The spelling of 31143140713 in words is "thirty-one billion, one hundred forty-three million, one hundred forty thousand, seven hundred thirteen".