33221145 has 16 divisors (see below), whose sum is σ = 56280960. Its totient is φ = 16675584.

The previous prime is 33221137. The next prime is 33221161. The reversal of 33221145 is 54112233.

It is not a de Polignac number, because 33221145 - 2³ = 33221137 is a prime.

It is a super-2 number, since 2×33221145² = 2207288950222050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64885 + ... + 65394.

It is an arithmetic number, because the mean of its divisors is an integer number (3517560).

Almost surely, 2^33221145 is an apocalyptic number.

It is an amenable number.

33221145 is a deficient number, since it is larger than the sum of its proper divisors (23059815).

33221145 is a wasteful number, since it uses less digits than its factorization.

33221145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130304.

The product of its digits is 720, while the sum is 21.

The square root of 33221145 is about 5763.7787084516. The cubic root of 33221145 is about 321.4683335643.

Adding to 33221145 its reverse (54112233), we get a palindrome (87333378).

The spelling of 33221145 in words is "thirty-three million, two hundred twenty-one thousand, one hundred forty-five".