13555222 has 8 divisors (see below), whose sum is σ = 21528936. Its totient is φ = 6378912.

The previous prime is 13555187. The next prime is 13555231. The reversal of 13555222 is 22255531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199308 + ... + 199375.

It is an arithmetic number, because the mean of its divisors is an integer number (2691117).

Almost surely, 2^13555222 is an apocalyptic number.

13555222 is a deficient number, since it is larger than the sum of its proper divisors (7973714).

13555222 is a wasteful number, since it uses less digits than its factorization.

13555222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398702.

The product of its digits is 3000, while the sum is 25.

The square root of 13555222 is about 3681.7417073988. The cubic root of 13555222 is about 238.4343807862.

The spelling of 13555222 in words is "thirteen million, five hundred fifty-five thousand, two hundred twenty-two".