131223024011440 has 80 divisors (see below), whose sum is σ = 305569378558080. Its totient is φ = 52407400939520.

The previous prime is 131223024011407. The next prime is 131223024011447. The reversal of 131223024011440 is 44110420322131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 131223024011399 and 131223024011408.

It is not an unprimeable number, because it can be changed into a prime (131223024011447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145788696 + ... + 146686024.

It is an arithmetic number, because the mean of its divisors is an integer number (3819617231976).

Almost surely, 2^{131223024011440} is an apocalyptic number.

131223024011440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131223024011440 is an abundant number, since it is smaller than the sum of its proper divisors (174346354546640).

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

131223024011440 is a wasteful number, since it uses less digits than its factorization.

131223024011440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900190 (or 900184 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 131223024011440 its reverse (44110420322131), we get a palindrome (175333444333571).

The spelling of 131223024011440 in words is "one hundred thirty-one trillion, two hundred twenty-three billion, twenty-four million, eleven thousand, four hundred forty".