33506161 has 4 divisors (see below), whose sum is σ = 36083572. Its totient is φ = 30928752.

The previous prime is 33506153. The next prime is 33506171. The reversal of 33506161 is 16160533.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18147600 + 15358561 = 4260^2 + 3919^2 .

It is a cyclic number.

It is not a de Polignac number, because 33506161 - 2³ = 33506153 is a prime.

It is a super-2 number, since 2×33506161² = 2245325649915842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33506111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1288686 + ... + 1288711.

It is an arithmetic number, because the mean of its divisors is an integer number (9020893).

Almost surely, 2^33506161 is an apocalyptic number.

It is an amenable number.

33506161 is a deficient number, since it is larger than the sum of its proper divisors (2577411).

33506161 is a wasteful number, since it uses less digits than its factorization.

33506161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577410.

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

The square root of 33506161 is about 5788.4506562637. The cubic root of 33506161 is about 322.3850472667.

Adding to 33506161 its reverse (16160533), we get a palindrome (49666694).

The spelling of 33506161 in words is "thirty-three million, five hundred six thousand, one hundred sixty-one".