13643222 has 4 divisors (see below), whose sum is σ = 20464836. Its totient is φ = 6821610.

The previous prime is 13643213. The next prime is 13643239. The reversal of 13643222 is 22234631.

13643222 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: 22234631 = 97 ⋅229223.

It is a super-2 number, since 2×13643222² = 372275013082568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3410804 + ... + 3410807.

It is an arithmetic number, because the mean of its divisors is an integer number (5116209).

Almost surely, 2^13643222 is an apocalyptic number.

13643222 is a deficient number, since it is larger than the sum of its proper divisors (6821614).

13643222 is an equidigital number, since it uses as much as digits as its factorization.

13643222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821613.

The product of its digits is 1728, while the sum is 23.

The square root of 13643222 is about 3693.6732394731. The cubic root of 13643222 is about 238.9492373064.

Adding to 13643222 its reverse (22234631), we get a palindrome (35877853).

The spelling of 13643222 in words is "thirteen million, six hundred forty-three thousand, two hundred twenty-two".