13712213 has 4 divisors (see below), whose sum is σ = 13970988. Its totient is φ = 13453440.

The previous prime is 13712191. The next prime is 13712219. The reversal of 13712213 is 31221731.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9878449 + 3833764 = 3143^2 + 1958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13712213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13712219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129308 + ... + 129413.

It is an arithmetic number, because the mean of its divisors is an integer number (3492747).

Almost surely, 2^13712213 is an apocalyptic number.

It is an amenable number.

13712213 is a deficient number, since it is larger than the sum of its proper divisors (258775).

13712213 is an equidigital number, since it uses as much as digits as its factorization.

13712213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258774.

The product of its digits is 252, while the sum is 20.

The square root of 13712213 is about 3703.0005401026. Note that the first 3 decimals coincide. The cubic root of 13712213 is about 239.3513328659.

Adding to 13712213 its reverse (31221731), we get a palindrome (44933944).

The spelling of 13712213 in words is "thirteen million, seven hundred twelve thousand, two hundred thirteen".