13222155 has 8 divisors (see below), whose sum is σ = 21155472. Its totient is φ = 7051808.

The previous prime is 13222133. The next prime is 13222159. The reversal of 13222155 is 55122231.

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

It is a cyclic number.

It is not a de Polignac number, because 13222155 - 2⁵ = 13222123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13222159) 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, 440724 + ... + 440753.

It is an arithmetic number, because the mean of its divisors is an integer number (2644434).

Almost surely, 2^13222155 is an apocalyptic number.

13222155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13222155 is a deficient number, since it is larger than the sum of its proper divisors (7933317).

13222155 is an equidigital number, since it uses as much as digits as its factorization.

13222155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881485.

The product of its digits is 600, while the sum is 21.

The square root of 13222155 is about 3636.2281281570. The cubic root of 13222155 is about 236.4652974245.

Adding to 13222155 its reverse (55122231), we get a palindrome (68344386).

The spelling of 13222155 in words is "thirteen million, two hundred twenty-two thousand, one hundred fifty-five".