13212166 has 16 divisors (see below), whose sum is σ = 22560768. Its totient is φ = 5744200.

The previous prime is 13212161. The next prime is 13212167. The reversal of 13212166 is 66121231.

It is a super-2 number, since 2×13212166² = 349122660823112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13212161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12550 + ... + 13561.

It is an arithmetic number, because the mean of its divisors is an integer number (1410048).

Almost surely, 2^13212166 is an apocalyptic number.

13212166 is a deficient number, since it is larger than the sum of its proper divisors (9348602).

13212166 is a wasteful number, since it uses less digits than its factorization.

13212166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26147.

The product of its digits is 432, while the sum is 22.

The square root of 13212166 is about 3634.8543299560. The cubic root of 13212166 is about 236.4057345941.

Adding to 13212166 its reverse (66121231), we get a palindrome (79333397).

The spelling of 13212166 in words is "thirteen million, two hundred twelve thousand, one hundred sixty-six".