13181222 has 8 divisors (see below), whose sum is σ = 20934936. Its totient is φ = 6202912.

The previous prime is 13181173. The next prime is 13181227. The reversal of 13181222 is 22218131.

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

It is a super-2 number, since 2×13181222² = 347489226826568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13181194 and 13181203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13181227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193808 + ... + 193875.

It is an arithmetic number, because the mean of its divisors is an integer number (2616867).

Almost surely, 2^13181222 is an apocalyptic number.

13181222 is a deficient number, since it is larger than the sum of its proper divisors (7753714).

13181222 is a wasteful number, since it uses less digits than its factorization.

13181222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387702.

The product of its digits is 192, while the sum is 20.

The square root of 13181222 is about 3630.5952679967. The cubic root of 13181222 is about 236.2210296401.

Adding to 13181222 its reverse (22218131), we get a palindrome (35399353).

The spelling of 13181222 in words is "thirteen million, one hundred eighty-one thousand, two hundred twenty-two".