22133523 has 4 divisors (see below), whose sum is σ = 29511368. Its totient is φ = 14755680.

The previous prime is 22133491. The next prime is 22133533. The reversal of 22133523 is 32533122.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22133523 - 2⁵ = 22133491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22133523.

It is not an unprimeable number, because it can be changed into a prime (22133533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3688918 + ... + 3688923.

It is an arithmetic number, because the mean of its divisors is an integer number (7377842).

Almost surely, 2^22133523 is an apocalyptic number.

22133523 is a deficient number, since it is larger than the sum of its proper divisors (7377845).

22133523 is an equidigital number, since it uses as much as digits as its factorization.

22133523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7377844.

The product of its digits is 1080, while the sum is 21.

The square root of 22133523 is about 4704.6278280009. The cubic root of 22133523 is about 280.7696638724.

Adding to 22133523 its reverse (32533122), we get a palindrome (54666645).

The spelling of 22133523 in words is "twenty-two million, one hundred thirty-three thousand, five hundred twenty-three".