131223 has 16 divisors (see below), whose sum is σ = 193536. Its totient is φ = 78720.

The previous prime is 131221. The next prime is 131231. The reversal of 131223 is 322131.

It is a happy number.

It is not a de Polignac number, because 131223 - 2¹ = 131221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131199 and 131208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131221) 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, 1540 + ... + 1622.

It is an arithmetic number, because the mean of its divisors is an integer number (12096).

2¹³¹²²³ is an apocalyptic number.

131223 is a deficient number, since it is larger than the sum of its proper divisors (62313).

131223 is a wasteful number, since it uses less digits than its factorization.

131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134.

The product of its digits is 36, while the sum is 12.

The square root of 131223 is about 362.2471531979. The cubic root of 131223 is about 50.8163328142.

Adding to 131223 its reverse (322131), we get a palindrome (453354).

The spelling of 131223 in words is "one hundred thirty-one thousand, two hundred twenty-three".