131320351243 has 4 divisors (see below), whose sum is σ = 131865249208. Its totient is φ = 130775453280.

The previous prime is 131320351241. The next prime is 131320351289. The reversal of 131320351243 is 342153023131.

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 131320351243 - 2¹ = 131320351241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131320351241) 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, 272448621 + ... + 272449102.

It is an arithmetic number, because the mean of its divisors is an integer number (32966312302).

Almost surely, 2^131320351243 is an apocalyptic number.

131320351243 is a deficient number, since it is larger than the sum of its proper divisors (544897965).

131320351243 is an equidigital number, since it uses as much as digits as its factorization.

131320351243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544897964.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 131320351243 its reverse (342153023131), we get a palindrome (473473374374).

The spelling of 131320351243 in words is "one hundred thirty-one billion, three hundred twenty million, three hundred fifty-one thousand, two hundred forty-three".