12531232223 has 4 divisors (see below), whose sum is σ = 12551477160. Its totient is φ = 12510987288.

The previous prime is 12531232211. The next prime is 12531232229. The reversal of 12531232223 is 32223213521.

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 12531232223 - 2⁶ = 12531232159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12531232192 and 12531232201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12531232229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10121540 + ... + 10122777.

It is an arithmetic number, because the mean of its divisors is an integer number (3137869290).

Almost surely, 2^12531232223 is an apocalyptic number.

12531232223 is a deficient number, since it is larger than the sum of its proper divisors (20244937).

12531232223 is an equidigital number, since it uses as much as digits as its factorization.

12531232223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20244936.

The product of its digits is 4320, while the sum is 26.

Adding to 12531232223 its reverse (32223213521), we get a palindrome (44754445744).

The spelling of 12531232223 in words is "twelve billion, five hundred thirty-one million, two hundred thirty-two thousand, two hundred twenty-three".