13722222 has 16 divisors (see below), whose sum is σ = 27482112. Its totient is φ = 4567800.

The previous prime is 13722217. The next prime is 13722229. The reversal of 13722222 is 22222731.

It is a happy number.

13722222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

13722222 is a modest number, since divided by 2222 gives 1372 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13722229) 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, 5913 + ... + 7899.

It is an arithmetic number, because the mean of its divisors is an integer number (1717632).

Almost surely, 2^13722222 is an apocalyptic number.

13722222 is an abundant number, since it is smaller than the sum of its proper divisors (13759890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13722222 is a wasteful number, since it uses less digits than its factorization.

13722222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143.

The product of its digits is 672, while the sum is 21.

The square root of 13722222 is about 3704.3517651541. The cubic root of 13722222 is about 239.4095555329.

Adding to 13722222 its reverse (22222731), we get a palindrome (35944953).

The spelling of 13722222 in words is "thirteen million, seven hundred twenty-two thousand, two hundred twenty-two".