13131223 has 8 divisors (see below), whose sum is σ = 15797120. Its totient is φ = 10662840.

The previous prime is 13131203. The next prime is 13131233. The reversal of 13131223 is 32213131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13131223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13131197 and 13131206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49233 + ... + 49498.

It is an arithmetic number, because the mean of its divisors is an integer number (1974640).

Almost surely, 2^13131223 is an apocalyptic number.

13131223 is a deficient number, since it is larger than the sum of its proper divisors (2665897).

13131223 is an equidigital number, since it uses as much as digits as its factorization.

13131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98757.

The product of its digits is 108, while the sum is 16.

The square root of 13131223 is about 3623.7029403636. The cubic root of 13131223 is about 235.9219733916.

Adding to 13131223 its reverse (32213131), we get a palindrome (45344354).

The spelling of 13131223 in words is "thirteen million, one hundred thirty-one thousand, two hundred twenty-three".