33113261 has 16 divisors (see below), whose sum is σ = 35852544. Its totient is φ = 30501504.

The previous prime is 33113237. The next prime is 33113279. The reversal of 33113261 is 16231133.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33113261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33113221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142001 + ... + 142233.

It is an arithmetic number, because the mean of its divisors is an integer number (2240784).

Almost surely, 2^33113261 is an apocalyptic number.

It is an amenable number.

33113261 is a deficient number, since it is larger than the sum of its proper divisors (2739283).

33113261 is a wasteful number, since it uses less digits than its factorization.

33113261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460.

The product of its digits is 324, while the sum is 20.

The square root of 33113261 is about 5754.4123070910. The cubic root of 33113261 is about 321.1199721066.

Adding to 33113261 its reverse (16231133), we get a palindrome (49344394).

The spelling of 33113261 in words is "thirty-three million, one hundred thirteen thousand, two hundred sixty-one".