33220393 has 2 divisors, whose sum is σ = 33220394. Its totient is φ = 33220392.

The previous prime is 33220391. The next prime is 33220423. The reversal of 33220393 is 39302233.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27594009 + 5626384 = 5253^2 + 2372^2 .

It is a cyclic number.

It is not a de Polignac number, because 33220393 - 2¹ = 33220391 is a prime.

It is a super-2 number, since 2×33220393² = 2207189022148898, which contains 22 as substring.

Together with 33220391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (33220391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16610196 + 16610197.

It is an arithmetic number, because the mean of its divisors is an integer number (16610197).

Almost surely, 2^33220393 is an apocalyptic number.

It is an amenable number.

33220393 is a deficient number, since it is larger than the sum of its proper divisors (1).

33220393 is an equidigital number, since it uses as much as digits as its factorization.

33220393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 25.

The square root of 33220393 is about 5763.7134731005. The cubic root of 33220393 is about 321.4659079404.

The spelling of 33220393 in words is "thirty-three million, two hundred twenty thousand, three hundred ninety-three".