13221626 has 8 divisors (see below), whose sum is σ = 21635424. Its totient is φ = 6009820.

The previous prime is 13221623. The next prime is 13221629. The reversal of 13221626 is 62612231.

It is an interprime number because it is at equal distance from previous prime (13221623) and next prime (13221629).

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

It is a super-2 number, since 2×13221626² = 349622788167752, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13221623) 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, 300470 + ... + 300513.

It is an arithmetic number, because the mean of its divisors is an integer number (2704428).

Almost surely, 2^13221626 is an apocalyptic number.

13221626 is a deficient number, since it is larger than the sum of its proper divisors (8413798).

13221626 is a wasteful number, since it uses less digits than its factorization.

13221626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600996.

The product of its digits is 864, while the sum is 23.

The square root of 13221626 is about 3636.1553872188. The cubic root of 13221626 is about 236.4621438334.

Adding to 13221626 its reverse (62612231), we get a palindrome (75833857).

It can be divided in two parts, 13221 and 626, that multiplied together give a triangular number (8276346 = T₄₀₆₈).

The spelling of 13221626 in words is "thirteen million, two hundred twenty-one thousand, six hundred twenty-six".