13222261 has 4 divisors (see below), whose sum is σ = 14239372. Its totient is φ = 12205152.

The previous prime is 13222229. The next prime is 13222267. The reversal of 13222261 is 16222231.

13222261 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, and also an emirpimes, since its reverse is a distinct semiprime: 16222231 = 647 ⋅25073.

It can be written as a sum of positive squares in 2 ways, for example, as 6300100 + 6922161 = 2510^2 + 2631^2 .

It is a cyclic number.

It is not a de Polignac number, because 13222261 - 2⁵ = 13222229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13222267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508536 + ... + 508561.

It is an arithmetic number, because the mean of its divisors is an integer number (3559843).

Almost surely, 2^13222261 is an apocalyptic number.

It is an amenable number.

13222261 is a deficient number, since it is larger than the sum of its proper divisors (1017111).

13222261 is a wasteful number, since it uses less digits than its factorization.

13222261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017110.

The product of its digits is 288, while the sum is 19.

The square root of 13222261 is about 3636.2427036709. The cubic root of 13222261 is about 236.4659293249.

Adding to 13222261 its reverse (16222231), we get a palindrome (29444492).

The spelling of 13222261 in words is "thirteen million, two hundred twenty-two thousand, two hundred sixty-one".