131224 has 16 divisors (see below), whose sum is σ = 252000. Its totient is φ = 64032.

The previous prime is 131221. The next prime is 131231. The reversal of 131224 is 422131.

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 3 ways as a sum of consecutive naturals, for example, 202 + ... + 550.

It is an arithmetic number, because the mean of its divisors is an integer number (15750).

2¹³¹²²⁴ is an apocalyptic number.

It is an amenable number.

131224 is a deficient number, since it is larger than the sum of its proper divisors (120776).

131224 is a wasteful number, since it uses less digits than its factorization.

131224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 398 counting only the distinct ones).

The product of its digits is 48, while the sum is 13.

The square root of 131224 is about 362.2485334684. The cubic root of 131224 is about 50.8164618978.

Adding to 131224 its reverse (422131), we get a palindrome (553355).

The spelling of 131224 in words is "one hundred thirty-one thousand, two hundred twenty-four".