131503543 has 4 divisors (see below), whose sum is σ = 131578920. Its totient is φ = 131428168.

The previous prime is 131503481. The next prime is 131503553. The reversal of 131503543 is 345305131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345305131 = 103 ⋅3352477.

It is a cyclic number.

It is not a de Polignac number, because 131503543 - 2¹⁷ = 131372471 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 (131503553) 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, 35008 + ... + 38581.

It is an arithmetic number, because the mean of its divisors is an integer number (32894730).

Almost surely, 2^131503543 is an apocalyptic number.

131503543 is a deficient number, since it is larger than the sum of its proper divisors (75377).

131503543 is an equidigital number, since it uses as much as digits as its factorization.

131503543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75376.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 131503543 is about 11467.4994222803. The cubic root of 131503543 is about 508.5252062441.

Adding to 131503543 its reverse (345305131), we get a palindrome (476808674).

The spelling of 131503543 in words is "one hundred thirty-one million, five hundred three thousand, five hundred forty-three".