33561601 has 4 divisors (see below), whose sum is σ = 33573204. Its totient is φ = 33550000.

The previous prime is 33561599. The next prime is 33561607. The reversal of 33561601 is 10616533.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 28633201 + 4928400 = 5351^2 + 2220^2 .

It is a cyclic number.

It is not a de Polignac number, because 33561601 - 2¹ = 33561599 is a prime.

It is a super-2 number, since 2×33561601² = 2252762123366402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33561607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2451 + ... + 8551.

It is an arithmetic number, because the mean of its divisors is an integer number (8393301).

Almost surely, 2^33561601 is an apocalyptic number.

It is an amenable number.

33561601 is a deficient number, since it is larger than the sum of its proper divisors (11603).

33561601 is an equidigital number, since it uses as much as digits as its factorization.

33561601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11602.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 33561601 is about 5793.2375231817. The cubic root of 33561601 is about 322.5627576523.

The spelling of 33561601 in words is "thirty-three million, five hundred sixty-one thousand, six hundred one".