33243442261 has 2 divisors, whose sum is σ = 33243442262. Its totient is φ = 33243442260.

The previous prime is 33243442189. The next prime is 33243442273. The reversal of 33243442261 is 16224434233.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32592886225 + 650556036 = 180535^2 + 25506^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33243442261 is a prime.

It is a super-2 number, since 2×33243442261² (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 (33243442361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16621721130 + 16621721131.

It is an arithmetic number, because the mean of its divisors is an integer number (16621721131).

Almost surely, 2^33243442261 is an apocalyptic number.

It is an amenable number.

33243442261 is a deficient number, since it is larger than the sum of its proper divisors (1).

33243442261 is an equidigital number, since it uses as much as digits as its factorization.

33243442261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 34.

Adding to 33243442261 its reverse (16224434233), we get a palindrome (49467876494).

The spelling of 33243442261 in words is "thirty-three billion, two hundred forty-three million, four hundred forty-two thousand, two hundred sixty-one".