33290561 has 2 divisors, whose sum is σ = 33290562. Its totient is φ = 33290560.

The previous prime is 33290533. The next prime is 33290581. The reversal of 33290561 is 16509233.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32993536 + 297025 = 5744^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 33290561 - 2¹⁰ = 33289537 is a prime.

It is a super-2 number, since 2×33290561² = 2216522903389442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33290501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16645280 + 16645281.

It is an arithmetic number, because the mean of its divisors is an integer number (16645281).

Almost surely, 2^33290561 is an apocalyptic number.

It is an amenable number.

33290561 is a deficient number, since it is larger than the sum of its proper divisors (1).

33290561 is an equidigital number, since it uses as much as digits as its factorization.

33290561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 33290561 is about 5769.7973101314. The cubic root of 33290561 is about 321.6920818360.

Adding to 33290561 its reverse (16509233), we get a palindrome (49799794).

The spelling of 33290561 in words is "thirty-three million, two hundred ninety thousand, five hundred sixty-one".