33087331 has 2 divisors, whose sum is σ = 33087332. Its totient is φ = 33087330.

The previous prime is 33087319. The next prime is 33087359. The reversal of 33087331 is 13378033.

It is an a-pointer prime, because the next prime (33087359) can be obtained adding 33087331 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33087331 is a prime.

It is a super-2 number, since 2×33087331² = 2189542945407122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33087331.

It is not a weakly prime, because it can be changed into another prime (33087371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16543665 + 16543666.

It is an arithmetic number, because the mean of its divisors is an integer number (16543666).

Almost surely, 2^33087331 is an apocalyptic number.

33087331 is a deficient number, since it is larger than the sum of its proper divisors (1).

33087331 is an equidigital number, since it uses as much as digits as its factorization.

33087331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 33087331 is about 5752.1588121331. The cubic root of 33087331 is about 321.0361304168.

The spelling of 33087331 in words is "thirty-three million, eighty-seven thousand, three hundred thirty-one".