31601114861 has 2 divisors, whose sum is σ = 31601114862. Its totient is φ = 31601114860.

The previous prime is 31601114813. The next prime is 31601114863. The reversal of 31601114861 is 16841110613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31020015625 + 581099236 = 176125^2 + 24106^2 .

It is a cyclic number.

It is not a de Polignac number, because 31601114861 - 2¹⁰ = 31601113837 is a prime.

Together with 31601114863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31601114863) 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, 15800557430 + 15800557431.

It is an arithmetic number, because the mean of its divisors is an integer number (15800557431).

Almost surely, 2^31601114861 is an apocalyptic number.

It is an amenable number.

31601114861 is a deficient number, since it is larger than the sum of its proper divisors (1).

31601114861 is an equidigital number, since it uses as much as digits as its factorization.

31601114861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The spelling of 31601114861 in words is "thirty-one billion, six hundred one million, one hundred fourteen thousand, eight hundred sixty-one".