13220222 has 4 divisors (see below), whose sum is σ = 19830336. Its totient is φ = 6610110.

The previous prime is 13220213. The next prime is 13220231. The reversal of 13220222 is 22202231.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (13220213) and next prime (13220231).

It is a junction number, because it is equal to n+sod(n) for n = 13220197 and 13220206.

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, 3305054 + ... + 3305057.

It is an arithmetic number, because the mean of its divisors is an integer number (4957584).

Almost surely, 2^13220222 is an apocalyptic number.

13220222 is a deficient number, since it is larger than the sum of its proper divisors (6610114).

13220222 is an equidigital number, since it uses as much as digits as its factorization.

13220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6610113.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 13220222 is about 3635.9623210369. The cubic root of 13220222 is about 236.4537735921.

Adding to 13220222 its reverse (22202231), we get a palindrome (35422453).

Subtracting 13220222 from its reverse (22202231), we obtain a square (8982009 = 2997²).

It can be divided in two parts, 1 and 3220222, that added together give a palindrome (3220223).

The spelling of 13220222 in words is "thirteen million, two hundred twenty thousand, two hundred twenty-two".