13213236 has 12 divisors (see below), whose sum is σ = 30830912. Its totient is φ = 4404408.

The previous prime is 13213231. The next prime is 13213237. The reversal of 13213236 is 63231231.

13213236 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213231) 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, 550540 + ... + 550563.

Almost surely, 2^13213236 is an apocalyptic number.

It is an amenable number.

13213236 is an abundant number, since it is smaller than the sum of its proper divisors (17617676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13213236 is a wasteful number, since it uses less digits than its factorization.

13213236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101110 (or 1101108 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 13213236 is about 3635.0015130671. The cubic root of 13213236 is about 236.4121162705.

Adding to 13213236 its reverse (63231231), we get a palindrome (76444467).

The spelling of 13213236 in words is "thirteen million, two hundred thirteen thousand, two hundred thirty-six".