131201336543 has 4 divisors (see below), whose sum is σ = 138919062240. Its totient is φ = 123483610848.

The previous prime is 131201336531. The next prime is 131201336561. The reversal of 131201336543 is 345633102131.

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 131201336543 - 2¹² = 131201332447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131201336573) 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, 3858862823 + ... + 3858862856.

It is an arithmetic number, because the mean of its divisors is an integer number (34729765560).

Almost surely, 2^131201336543 is an apocalyptic number.

131201336543 is a deficient number, since it is larger than the sum of its proper divisors (7717725697).

131201336543 is an equidigital number, since it uses as much as digits as its factorization.

131201336543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7717725696.

The product of its (nonzero) digits is 19440, while the sum is 32.

Adding to 131201336543 its reverse (345633102131), we get a palindrome (476834438674).

The spelling of 131201336543 in words is "one hundred thirty-one billion, two hundred one million, three hundred thirty-six thousand, five hundred forty-three".