13222045 has 4 divisors (see below), whose sum is σ = 15866460. Its totient is φ = 10577632.

The previous prime is 13222037. The next prime is 13222067. The reversal of 13222045 is 54022231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54022231 = 1307 ⋅41333.

It can be written as a sum of positive squares in 2 ways, for example, as 2424249 + 10797796 = 1557^2 + 3286^2 .

It is a cyclic number.

It is not a de Polignac number, because 13222045 - 2³ = 13222037 is a prime.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 1322200 + ... + 1322209.

It is an arithmetic number, because the mean of its divisors is an integer number (3966615).

Almost surely, 2^13222045 is an apocalyptic number.

It is an amenable number.

13222045 is a deficient number, since it is larger than the sum of its proper divisors (2644415).

13222045 is an equidigital number, since it uses as much as digits as its factorization.

13222045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644414.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 13222045 is about 3636.2130025619. The cubic root of 13222045 is about 236.4646416752.

Adding to 13222045 its reverse (54022231), we get a palindrome (67244276).

The spelling of 13222045 in words is "thirteen million, two hundred twenty-two thousand, forty-five".