33506881 has 8 divisors (see below), whose sum is σ = 36343944. Its totient is φ = 30766080.

The previous prime is 33506857. The next prime is 33506897. The reversal of 33506881 is 18860533.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5363856 + 28143025 = 2316^2 + 5305^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33506881 is a prime.

It is a super-2 number, since 2×33506881² = 2245422148696322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33506801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23340 + ... + 24733.

It is an arithmetic number, because the mean of its divisors is an integer number (4542993).

Almost surely, 2^33506881 is an apocalyptic number.

It is an amenable number.

33506881 is a deficient number, since it is larger than the sum of its proper divisors (2837063).

33506881 is a wasteful number, since it uses less digits than its factorization.

33506881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48131.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 33506881 is about 5788.5128487376. The cubic root of 33506881 is about 322.3873564497.

The spelling of 33506881 in words is "thirty-three million, five hundred six thousand, eight hundred eighty-one".