13156222 has 4 divisors (see below), whose sum is σ = 19734336. Its totient is φ = 6578110.

The previous prime is 13156163. The next prime is 13156259. The reversal of 13156222 is 22265131.

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

It is a junction number, because it is equal to n+sod(n) for n = 13156193 and 13156202.

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, 3289054 + ... + 3289057.

It is an arithmetic number, because the mean of its divisors is an integer number (4933584).

Almost surely, 2^13156222 is an apocalyptic number.

13156222 is a deficient number, since it is larger than the sum of its proper divisors (6578114).

13156222 is an equidigital number, since it uses as much as digits as its factorization.

13156222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6578113.

The product of its digits is 720, while the sum is 22.

The square root of 13156222 is about 3627.1506723598. The cubic root of 13156222 is about 236.0715932366.

The spelling of 13156222 in words is "thirteen million, one hundred fifty-six thousand, two hundred twenty-two".