33087881 has 4 divisors (see below), whose sum is σ = 34155264. Its totient is φ = 32020500.

The previous prime is 33087871. The next prime is 33087889. The reversal of 33087881 is 18878033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33087881 - 2¹⁴ = 33071497 is a prime.

It is a super-2 number, since 2×33087881² = 2189615738140322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33087889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533645 + ... + 533706.

It is an arithmetic number, because the mean of its divisors is an integer number (8538816).

Almost surely, 2^33087881 is an apocalyptic number.

33087881 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

33087881 is a deficient number, since it is larger than the sum of its proper divisors (1067383).

33087881 is a wasteful number, since it uses less digits than its factorization.

33087881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067382.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 33087881 is about 5752.2066200720. The cubic root of 33087881 is about 321.0379092336.

The spelling of 33087881 in words is "thirty-three million, eighty-seven thousand, eight hundred eighty-one".