131231222223 has 24 divisors (see below), whose sum is σ = 181373007024. Its totient is φ = 84397633920.

The previous prime is 131231222219. The next prime is 131231222231. The reversal of 131231222223 is 322222132131.

It is not a de Polignac number, because 131231222223 - 2² = 131231222219 is a prime.

It is a super-2 number, since 2×131231222223² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131231222193 and 131231222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131231222233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 842115 + ... + 985707.

It is an arithmetic number, because the mean of its divisors is an integer number (7557208626).

Almost surely, 2^131231222223 is an apocalyptic number.

131231222223 is a deficient number, since it is larger than the sum of its proper divisors (50141784801).

131231222223 is a wasteful number, since it uses less digits than its factorization.

131231222223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143975 (or 143944 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

Adding to 131231222223 its reverse (322222132131), we get a palindrome (453453354354).

The spelling of 131231222223 in words is "one hundred thirty-one billion, two hundred thirty-one million, two hundred twenty-two thousand, two hundred twenty-three".