131223231232 has 72 divisors (see below), whose sum is σ = 275409091440. Its totient is φ = 62310420480.

The previous prime is 131223231199. The next prime is 131223231253. The reversal of 131223231232 is 232132322131.

It is a junction number, because it is equal to n+sod(n) for n = 131223231197 and 131223231206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307983 + ... + 597745.

It is an arithmetic number, because the mean of its divisors is an integer number (3825126270).

Almost surely, 2^131223231232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131223231232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137704545720).

131223231232 is an abundant number, since it is smaller than the sum of its proper divisors (144185860208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131223231232 is an equidigital number, since it uses as much as digits as its factorization.

131223231232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289869 (or 289855 counting only the distinct ones).

The product of its digits is 2592, while the sum is 25.

Adding to 131223231232 its reverse (232132322131), we get a palindrome (363355553363).

The spelling of 131223231232 in words is "one hundred thirty-one billion, two hundred twenty-three million, two hundred thirty-one thousand, two hundred thirty-two".