131123223 has 72 divisors (see below), whose sum is σ = 241672704. Its totient is φ = 67050720.

The previous prime is 131123203. The next prime is 131123249. The reversal of 131123223 is 322321131.

It is not a de Polignac number, because 131123223 - 2¹² = 131119127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131123196 and 131123205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131123203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 785086 + ... + 785252.

Almost surely, 2^131123223 is an apocalyptic number.

131123223 is a deficient number, since it is larger than the sum of its proper divisors (110549481).

131123223 is a wasteful number, since it uses less digits than its factorization.

131123223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 291 counting only the distinct ones).

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

The square root of 131123223 is about 11450.9048987405. The cubic root of 131123223 is about 508.0344994343.

Adding to 131123223 its reverse (322321131), we get a palindrome (453444354).

The spelling of 131123223 in words is "one hundred thirty-one million, one hundred twenty-three thousand, two hundred twenty-three".