33481243981 has 2 divisors, whose sum is σ = 33481243982. Its totient is φ = 33481243980.

The previous prime is 33481243951. The next prime is 33481244021. The reversal of 33481243981 is 18934218433.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33175343881 + 305900100 = 182141^2 + 17490^2 .

It is a cyclic number.

It is not a de Polignac number, because 33481243981 - 2¹⁵ = 33481211213 is a prime.

It is a super-2 number, since 2×33481243981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33481243931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16740621990 + 16740621991.

It is an arithmetic number, because the mean of its divisors is an integer number (16740621991).

Almost surely, 2^33481243981 is an apocalyptic number.

It is an amenable number.

33481243981 is a deficient number, since it is larger than the sum of its proper divisors (1).

33481243981 is an equidigital number, since it uses as much as digits as its factorization.

33481243981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 46.

The spelling of 33481243981 in words is "thirty-three billion, four hundred eighty-one million, two hundred forty-three thousand, nine hundred eighty-one".