13222161 has 6 divisors (see below), whose sum is σ = 19098690. Its totient is φ = 8814768.

The previous prime is 13222159. The next prime is 13222163. The reversal of 13222161 is 16122231.

It is an interprime number because it is at equal distance from previous prime (13222159) and next prime (13222163).

It can be written as a sum of positive squares in only one way, i.e., 12531600 + 690561 = 3540^2 + 831^2 .

It is not a de Polignac number, because 13222161 - 2¹ = 13222159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13222163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 734556 + ... + 734573.

It is an arithmetic number, because the mean of its divisors is an integer number (3183115).

Almost surely, 2^13222161 is an apocalyptic number.

It is an amenable number.

13222161 is a deficient number, since it is larger than the sum of its proper divisors (5876529).

13222161 is a wasteful number, since it uses less digits than its factorization.

13222161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469135 (or 1469132 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 13222161 is about 3636.2289531876. The cubic root of 13222161 is about 236.4653331925.

Adding to 13222161 its reverse (16122231), we get a palindrome (29344392).

The spelling of 13222161 in words is "thirteen million, two hundred twenty-two thousand, one hundred sixty-one".