131123244433 has 4 divisors (see below), whose sum is σ = 134321372388. Its totient is φ = 127925116480.

The previous prime is 131123244419. The next prime is 131123244437. The reversal of 131123244433 is 334442321131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 334442321131 = 641 ⋅521750891.

It can be written as a sum of positive squares in 2 ways, for example, as 39974803969 + 91148440464 = 199937^2 + 301908^2 .

It is a cyclic number.

It is not a de Polignac number, because 131123244433 - 2⁵ = 131123244401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131123244395 and 131123244404.

It is not an unprimeable number, because it can be changed into a prime (131123244437) 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, 1599063916 + ... + 1599063997.

It is an arithmetic number, because the mean of its divisors is an integer number (33580343097).

Almost surely, 2^131123244433 is an apocalyptic number.

It is an amenable number.

131123244433 is a deficient number, since it is larger than the sum of its proper divisors (3198127955).

131123244433 is an equidigital number, since it uses as much as digits as its factorization.

131123244433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3198127954.

The product of its digits is 20736, while the sum is 31.

Adding to 131123244433 its reverse (334442321131), we get a palindrome (465565565564).

The spelling of 131123244433 in words is "one hundred thirty-one billion, one hundred twenty-three million, two hundred forty-four thousand, four hundred thirty-three".