33543352721 has 2 divisors, whose sum is σ = 33543352722. Its totient is φ = 33543352720.

The previous prime is 33543352643. The next prime is 33543352741. The reversal of 33543352721 is 12725334533.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33538794496 + 4558225 = 183136^2 + 2135^2 .

It is a cyclic number.

It is not a de Polignac number, because 33543352721 - 2¹⁸ = 33543090577 is a prime.

It is a super-2 number, since 2×33543352721² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (33543352741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16771676360 + 16771676361.

It is an arithmetic number, because the mean of its divisors is an integer number (16771676361).

Almost surely, 2^33543352721 is an apocalyptic number.

It is an amenable number.

33543352721 is a deficient number, since it is larger than the sum of its proper divisors (1).

33543352721 is an equidigital number, since it uses as much as digits as its factorization.

33543352721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 38.

The spelling of 33543352721 in words is "thirty-three billion, five hundred forty-three million, three hundred fifty-two thousand, seven hundred twenty-one".