33445145 has 4 divisors (see below), whose sum is σ = 40134180. Its totient is φ = 26756112.

The previous prime is 33445133. The next prime is 33445147. The reversal of 33445145 is 54154433.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54154433 = 2017 ⋅26849.

It can be written as a sum of positive squares in 2 ways, for example, as 18913801 + 14531344 = 4349^2 + 3812^2 .

It is a cyclic number.

It is not a de Polignac number, because 33445145 - 2⁴ = 33445129 is a prime.

It is a super-2 number, since 2×33445145² = 2237155448142050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33445147) 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, 3344510 + ... + 3344519.

It is an arithmetic number, because the mean of its divisors is an integer number (10033545).

Almost surely, 2^33445145 is an apocalyptic number.

It is an amenable number.

33445145 is a deficient number, since it is larger than the sum of its proper divisors (6689035).

33445145 is an equidigital number, since it uses as much as digits as its factorization.

33445145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6689034.

The product of its digits is 14400, while the sum is 29.

The square root of 33445145 is about 5783.1777596750. The cubic root of 33445145 is about 322.1892365274.

Adding to 33445145 its reverse (54154433), we get a palindrome (87599578).

The spelling of 33445145 in words is "thirty-three million, four hundred forty-five thousand, one hundred forty-five".