33350221 has 4 divisors (see below), whose sum is σ = 33369952. Its totient is φ = 33330492.

The previous prime is 33350201. The next prime is 33350227. The reversal of 33350221 is 12205333.

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 33350221 - 2²³ = 24961613 is a prime.

It is a super-2 number, since 2×33350221² = 2224474481497682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33350227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7065 + ... + 10798.

It is an arithmetic number, because the mean of its divisors is an integer number (8342488).

Almost surely, 2^33350221 is an apocalyptic number.

It is an amenable number.

33350221 is a deficient number, since it is larger than the sum of its proper divisors (19731).

33350221 is a wasteful number, since it uses less digits than its factorization.

33350221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19730.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 33350221 is about 5774.9650215391. The cubic root of 33350221 is about 321.8841352357.

Adding to 33350221 its reverse (12205333), we get a palindrome (45555554).

The spelling of 33350221 in words is "thirty-three million, three hundred fifty thousand, two hundred twenty-one".