13220236 has 12 divisors (see below), whose sum is σ = 23164960. Its totient is φ = 6601680.

The previous prime is 13220231. The next prime is 13220243. The reversal of 13220236 is 63202231.

13220236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13220231) 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, 2566 + ... + 5746.

Almost surely, 2^13220236 is an apocalyptic number.

It is an amenable number.

13220236 is a deficient number, since it is larger than the sum of its proper divisors (9944724).

13220236 is a wasteful number, since it uses less digits than its factorization.

13220236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4224 (or 4222 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 13220236 is about 3635.9642462489. The cubic root of 13220236 is about 236.4538570589.

Adding to 13220236 its reverse (63202231), we get a palindrome (76422467).

It can be divided in two parts, 13220 and 236, that added together give a square (13456 = 116²).

The spelling of 13220236 in words is "thirteen million, two hundred twenty thousand, two hundred thirty-six".