33087221 has 2 divisors, whose sum is σ = 33087222. Its totient is φ = 33087220.

The previous prime is 33087217. The next prime is 33087239. The reversal of 33087221 is 12278033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32364721 + 722500 = 5689^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 33087221 - 2² = 33087217 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33087251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16543610 + 16543611.

It is an arithmetic number, because the mean of its divisors is an integer number (16543611).

Almost surely, 2^33087221 is an apocalyptic number.

It is an amenable number.

33087221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33087221 is an equidigital number, since it uses as much as digits as its factorization.

33087221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 33087221 is about 5752.1492504976. The cubic root of 33087221 is about 321.0357746511.

The spelling of 33087221 in words is "thirty-three million, eighty-seven thousand, two hundred twenty-one".