131023223 has 2 divisors, whose sum is σ = 131023224. Its totient is φ = 131023222.

The previous prime is 131023163. The next prime is 131023229. The reversal of 131023223 is 322320131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131023223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131023229) 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 as a sum of consecutive naturals, namely, 65511611 + 65511612.

It is an arithmetic number, because the mean of its divisors is an integer number (65511612).

Almost surely, 2^131023223 is an apocalyptic number.

131023223 is a deficient number, since it is larger than the sum of its proper divisors (1).

131023223 is an equidigital number, since it uses as much as digits as its factorization.

131023223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 131023223 is about 11446.5375987676. The cubic root of 131023223 is about 507.9053172061.

Adding to 131023223 its reverse (322320131), we get a palindrome (453343354).

The spelling of 131023223 in words is "one hundred thirty-one million, twenty-three thousand, two hundred twenty-three".