33243145 has 12 divisors (see below), whose sum is σ = 43197516. Its totient is φ = 24548160.

The previous prime is 33243097. The next prime is 33243157. The reversal of 33243145 is 54134233.

It can be written as a sum of positive squares in 6 ways, for example, as 15468489 + 17774656 = 3933^2 + 4216^2 .

It is not a de Polignac number, because 33243145 - 2⁷ = 33243017 is a prime.

It is a super-2 number, since 2×33243145² = 2210213378982050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18826 + ... + 20515.

It is an arithmetic number, because the mean of its divisors is an integer number (3599793).

Almost surely, 2^33243145 is an apocalyptic number.

It is an amenable number.

33243145 is a deficient number, since it is larger than the sum of its proper divisors (9954371).

33243145 is a wasteful number, since it uses less digits than its factorization.

33243145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39372 (or 39359 counting only the distinct ones).

The product of its digits is 4320, while the sum is 25.

The square root of 33243145 is about 5765.6868628118. The cubic root of 33243145 is about 321.5392797719.

Adding to 33243145 its reverse (54134233), we get a palindrome (87377378).

The spelling of 33243145 in words is "thirty-three million, two hundred forty-three thousand, one hundred forty-five".