13222805 has 4 divisors (see below), whose sum is σ = 15867372. Its totient is φ = 10578240.

The previous prime is 13222789. The next prime is 13222823. The reversal of 13222805 is 50822231.

13222805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1540081 + 11682724 = 1241^2 + 3418^2 .

It is not a de Polignac number, because 13222805 - 2⁴ = 13222789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1322276 + ... + 1322285.

It is an arithmetic number, because the mean of its divisors is an integer number (3966843).

Almost surely, 2^13222805 is an apocalyptic number.

It is an amenable number.

13222805 is a deficient number, since it is larger than the sum of its proper divisors (2644567).

13222805 is an equidigital number, since it uses as much as digits as its factorization.

13222805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644566.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 13222805 is about 3636.3175053892. The cubic root of 13222805 is about 236.4691722322.

The spelling of 13222805 in words is "thirteen million, two hundred twenty-two thousand, eight hundred five".