131131223 has 4 divisors (see below), whose sum is σ = 131223048. Its totient is φ = 131039400.

The previous prime is 131131199. The next prime is 131131279. The reversal of 131131223 is 322131131.

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

It is a cyclic number.

It is not a de Polignac number, because 131131223 - 2¹² = 131127127 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 (131131723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43736 + ... + 46637.

It is an arithmetic number, because the mean of its divisors is an integer number (32805762).

Almost surely, 2^131131223 is an apocalyptic number.

131131223 is a deficient number, since it is larger than the sum of its proper divisors (91825).

131131223 is an equidigital number, since it uses as much as digits as its factorization.

131131223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91824.

The product of its digits is 108, while the sum is 17.

The square root of 131131223 is about 11451.2542107841. The cubic root of 131131223 is about 508.0448311749.

Adding to 131131223 its reverse (322131131), we get a palindrome (453262354).

The spelling of 131131223 in words is "one hundred thirty-one million, one hundred thirty-one thousand, two hundred twenty-three".