13223545 has 4 divisors (see below), whose sum is σ = 15868260. Its totient is φ = 10578832.

The previous prime is 13223527. The next prime is 13223549. The reversal of 13223545 is 54532231.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2274064 + 10949481 = 1508^2 + 3309^2 .

It is a cyclic number.

It is not a de Polignac number, because 13223545 - 2¹¹ = 13221497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13223549) 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, 1322350 + ... + 1322359.

It is an arithmetic number, because the mean of its divisors is an integer number (3967065).

Almost surely, 2^13223545 is an apocalyptic number.

It is an amenable number.

13223545 is a deficient number, since it is larger than the sum of its proper divisors (2644715).

13223545 is an equidigital number, since it uses as much as digits as its factorization.

13223545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644714.

The product of its digits is 3600, while the sum is 25.

The square root of 13223545 is about 3636.4192552565. The cubic root of 13223545 is about 236.4735833972.

Adding to 13223545 its reverse (54532231), we get a palindrome (67755776).

The spelling of 13223545 in words is "thirteen million, two hundred twenty-three thousand, five hundred forty-five".