131422543 has 4 divisors (see below), whose sum is σ = 150197200. Its totient is φ = 112647888.

The previous prime is 131422531. The next prime is 131422549. The reversal of 131422543 is 345224131.

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 131422543 - 2¹³ = 131414351 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 (131422549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9387318 + ... + 9387331.

It is an arithmetic number, because the mean of its divisors is an integer number (37549300).

Almost surely, 2^131422543 is an apocalyptic number.

131422543 is a deficient number, since it is larger than the sum of its proper divisors (18774657).

131422543 is an equidigital number, since it uses as much as digits as its factorization.

131422543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18774656.

The product of its digits is 2880, while the sum is 25.

The square root of 131422543 is about 11463.9671580130. The cubic root of 131422543 is about 508.4207755933.

Adding to 131422543 its reverse (345224131), we get a palindrome (476646674).

The spelling of 131422543 in words is "one hundred thirty-one million, four hundred twenty-two thousand, five hundred forty-three".