33123145 has 24 divisors (see below), whose sum is σ = 44557128. Its totient is φ = 23612160.

The previous prime is 33123143. The next prime is 33123193. The reversal of 33123145 is 54132133.

It can be written as a sum of positive squares in 4 ways, for example, as 14907321 + 18215824 = 3861^2 + 4268^2 .

It is not a de Polignac number, because 33123145 - 2¹ = 33123143 is a prime.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (33123143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31549 + ... + 32581.

It is an arithmetic number, because the mean of its divisors is an integer number (1856547).

Almost surely, 2^33123145 is an apocalyptic number.

It is an amenable number.

33123145 is a deficient number, since it is larger than the sum of its proper divisors (11433983).

33123145 is a wasteful number, since it uses less digits than its factorization.

33123145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113 (or 1102 counting only the distinct ones).

The product of its digits is 1080, while the sum is 22.

The square root of 33123145 is about 5755.2710622524. The cubic root of 33123145 is about 321.1519193685.

Adding to 33123145 its reverse (54132133), we get a palindrome (87255278).

The spelling of 33123145 in words is "thirty-three million, one hundred twenty-three thousand, one hundred forty-five".