33320345 has 4 divisors (see below), whose sum is σ = 39984420. Its totient is φ = 26656272.

The previous prime is 33320317. The next prime is 33320347. The reversal of 33320345 is 54302333.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54302333 = 23 ⋅2360971.

It can be written as a sum of positive squares in 2 ways, for example, as 20675209 + 12645136 = 4547^2 + 3556^2 .

It is a cyclic number.

It is not a de Polignac number, because 33320345 - 2¹⁴ = 33303961 is a prime.

It is a super-2 number, since 2×33320345² = 2220490781838050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33320345.

It is not an unprimeable number, because it can be changed into a prime (33320347) 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, 3332030 + ... + 3332039.

It is an arithmetic number, because the mean of its divisors is an integer number (9996105).

Almost surely, 2^33320345 is an apocalyptic number.

It is an amenable number.

33320345 is a deficient number, since it is larger than the sum of its proper divisors (6664075).

33320345 is an equidigital number, since it uses as much as digits as its factorization.

33320345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6664074.

The product of its (nonzero) digits is 3240, while the sum is 23.

The square root of 33320345 is about 5772.3777596412. The cubic root of 33320345 is about 321.7879891117.

Adding to 33320345 its reverse (54302333), we get a palindrome (87622678).

The spelling of 33320345 in words is "thirty-three million, three hundred twenty thousand, three hundred forty-five".