131233203243 has 40 divisors (see below), whose sum is σ = 207982776320. Its totient is φ = 82231374960.

The previous prime is 131233203229. The next prime is 131233203251. The reversal of 131233203243 is 342302332131.

131233203243 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 332 + 0 + 324 + 3 = 666.

It is not a de Polignac number, because 131233203243 - 2⁸ = 131233202987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131233203203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 140263 + ... + 531168.

It is an arithmetic number, because the mean of its divisors is an integer number (5199569408).

Almost surely, 2^131233203243 is an apocalyptic number.

131233203243 is a deficient number, since it is larger than the sum of its proper divisors (76749573077).

131233203243 is a wasteful number, since it uses less digits than its factorization.

131233203243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671589 (or 671580 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 131233203243 its reverse (342302332131), we get a palindrome (473535535374).

The spelling of 131233203243 in words is "one hundred thirty-one billion, two hundred thirty-three million, two hundred three thousand, two hundred forty-three".