33220549 has 2 divisors, whose sum is σ = 33220550. Its totient is φ = 33220548.

The previous prime is 33220519. The next prime is 33220571. The reversal of 33220549 is 94502233.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30448324 + 2772225 = 5518^2 + 1665^2 .

It is a cyclic number.

It is not a de Polignac number, because 33220549 - 2¹³ = 33212357 is a prime.

It is a super-2 number, since 2×33220549² = 2207209751722802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33220519) 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, 16610274 + 16610275.

It is an arithmetic number, because the mean of its divisors is an integer number (16610275).

Almost surely, 2^33220549 is an apocalyptic number.

It is an amenable number.

33220549 is a deficient number, since it is larger than the sum of its proper divisors (1).

33220549 is an equidigital number, since it uses as much as digits as its factorization.

33220549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 33220549 is about 5763.7270060266. The cubic root of 33220549 is about 321.4664111313.

It can be divided in two parts, 33220 and 549, that multiplied together give a triangular number (18237780 = T₆₀₃₉).

The spelling of 33220549 in words is "thirty-three million, two hundred twenty thousand, five hundred forty-nine".