33051840721 has 2 divisors, whose sum is σ = 33051840722. Its totient is φ = 33051840720.

The previous prime is 33051840631. The next prime is 33051840751. The reversal of 33051840721 is 12704815033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28188731025 + 4863109696 = 167895^2 + 69736^2 .

It is a cyclic number.

It is not a de Polignac number, because 33051840721 - 2¹⁹ = 33051316433 is a prime.

It is not a weakly prime, because it can be changed into another prime (33051840751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16525920360 + 16525920361.

It is an arithmetic number, because the mean of its divisors is an integer number (16525920361).

Almost surely, 2^33051840721 is an apocalyptic number.

It is an amenable number.

33051840721 is a deficient number, since it is larger than the sum of its proper divisors (1).

33051840721 is an equidigital number, since it uses as much as digits as its factorization.

33051840721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 33051840721 in words is "thirty-three billion, fifty-one million, eight hundred forty thousand, seven hundred twenty-one".