13611222 has 12 divisors (see below), whose sum is σ = 29491020. Its totient is φ = 4537068.

The previous prime is 13611217. The next prime is 13611229. The reversal of 13611222 is 22211631.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 756179 = 13611222 / (1 + 3 + 6 + 1 + 1 + 2 + 2 + 2).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 13611195 and 13611204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13611229) 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, 378072 + ... + 378107.

It is an arithmetic number, because the mean of its divisors is an integer number (2457585).

Almost surely, 2^13611222 is an apocalyptic number.

13611222 is an abundant number, since it is smaller than the sum of its proper divisors (15879798).

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

13611222 is a wasteful number, since it uses less digits than its factorization.

13611222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756187 (or 756184 counting only the distinct ones).

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

The square root of 13611222 is about 3689.3389651806. The cubic root of 13611222 is about 238.7622736122.

Adding to 13611222 its reverse (22211631), we get a palindrome (35822853).

The spelling of 13611222 in words is "thirteen million, six hundred eleven thousand, two hundred twenty-two".