33543281081 has 2 divisors, whose sum is σ = 33543281082. Its totient is φ = 33543281080.

The previous prime is 33543281071. The next prime is 33543281089. The reversal of 33543281081 is 18018234533.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26328307600 + 7214973481 = 162260^2 + 84941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33543281081 is a prime.

It is a super-2 number, since 2×33543281081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33543281089) 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, 16771640540 + 16771640541.

It is an arithmetic number, because the mean of its divisors is an integer number (16771640541).

Almost surely, 2^33543281081 is an apocalyptic number.

It is an amenable number.

33543281081 is a deficient number, since it is larger than the sum of its proper divisors (1).

33543281081 is an equidigital number, since it uses as much as digits as its factorization.

33543281081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 33543281081 in words is "thirty-three billion, five hundred forty-three million, two hundred eighty-one thousand, eighty-one".