31527341612917 has 2 divisors, whose sum is σ = 31527341612918. Its totient is φ = 31527341612916.

The previous prime is 31527341612909. The next prime is 31527341612951. The reversal of 31527341612917 is 71921614372513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24580564178641 + 6946777434276 = 4957879^2 + 2635674^2 .

It is an emirp because it is prime and its reverse (71921614372513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31527341612917 - 2³ = 31527341612909 is a prime.

It is a super-2 number, since 2×31527341612917² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31527341612617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15763670806458 + 15763670806459.

It is an arithmetic number, because the mean of its divisors is an integer number (15763670806459).

Almost surely, 2^{31527341612917} is an apocalyptic number.

It is an amenable number.

31527341612917 is a deficient number, since it is larger than the sum of its proper divisors (1).

31527341612917 is an equidigital number, since it uses as much as digits as its factorization.

31527341612917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 52.

The spelling of 31527341612917 in words is "thirty-one trillion, five hundred twenty-seven billion, three hundred forty-one million, six hundred twelve thousand, nine hundred seventeen".