31960111051511 has 2 divisors, whose sum is σ = 31960111051512. Its totient is φ = 31960111051510.

The previous prime is 31960111051499. The next prime is 31960111051523. The reversal of 31960111051511 is 11515011106913.

It is a balanced prime because it is at equal distance from previous prime (31960111051499) and next prime (31960111051523).

It is an emirp because it is prime and its reverse (11515011106913) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31960111051511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31960111051541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15980055525755 + 15980055525756.

It is an arithmetic number, because the mean of its divisors is an integer number (15980055525756).

Almost surely, 2^{31960111051511} is an apocalyptic number.

31960111051511 is a deficient number, since it is larger than the sum of its proper divisors (1).

31960111051511 is an equidigital number, since it uses as much as digits as its factorization.

31960111051511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 35.

The spelling of 31960111051511 in words is "thirty-one trillion, nine hundred sixty billion, one hundred eleven million, fifty-one thousand, five hundred eleven".