123131223 has 24 divisors (see below), whose sum is σ = 180516336. Its totient is φ = 80870400.

The previous prime is 123131219. The next prime is 123131237. The reversal of 123131223 is 322131321.

It is not a de Polignac number, because 123131223 - 2² = 123131219 is a prime.

It is a super-2 number, since 2×123131223² = 30322596154951458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123131196 and 123131205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123131273) 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 23 ways as a sum of consecutive naturals, for example, 213111 + ... + 213687.

It is an arithmetic number, because the mean of its divisors is an integer number (7521514).

Almost surely, 2^123131223 is an apocalyptic number.

123131223 is a deficient number, since it is larger than the sum of its proper divisors (57385113).

123131223 is a wasteful number, since it uses less digits than its factorization.

123131223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895 (or 892 counting only the distinct ones).

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

The square root of 123131223 is about 11096.4509191002. The cubic root of 123131223 is about 497.4957759967.

Adding to 123131223 its reverse (322131321), we get a palindrome (445262544).

The spelling of 123131223 in words is "one hundred twenty-three million, one hundred thirty-one thousand, two hundred twenty-three".