131223213 has 16 divisors (see below), whose sum is σ = 212078400. Its totient is φ = 79529040.

The previous prime is 131223193. The next prime is 131223227. The reversal of 131223213 is 312322131.

It is not a de Polignac number, because 131223213 - 2⁵ = 131223181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131223233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220618 + ... + 221211.

It is an arithmetic number, because the mean of its divisors is an integer number (13254900).

Almost surely, 2^131223213 is an apocalyptic number.

It is an amenable number.

131223213 is a deficient number, since it is larger than the sum of its proper divisors (80855187).

131223213 is a wasteful number, since it uses less digits than its factorization.

131223213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441849 (or 441843 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 131223213 is about 11455.2700972085. The cubic root of 131223213 is about 508.1636030911.

Adding to 131223213 its reverse (312322131), we get a palindrome (443545344).

The spelling of 131223213 in words is "one hundred thirty-one million, two hundred twenty-three thousand, two hundred thirteen".