131436541 has 4 divisors (see below), whose sum is σ = 131813500. Its totient is φ = 131059584.

The previous prime is 131436527. The next prime is 131436551. The reversal of 131436541 is 145634131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145634131 = 241 ⋅604291.

It can be written as a sum of positive squares in 2 ways, for example, as 51065316 + 80371225 = 7146^2 + 8965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131436541 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 (131436521) 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, 187956 + ... + 188653.

It is an arithmetic number, because the mean of its divisors is an integer number (32953375).

Almost surely, 2^131436541 is an apocalyptic number.

It is an amenable number.

131436541 is a deficient number, since it is larger than the sum of its proper divisors (376959).

131436541 is an equidigital number, since it uses as much as digits as its factorization.

131436541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376958.

The product of its digits is 4320, while the sum is 28.

The square root of 131436541 is about 11464.5776633943. The cubic root of 131436541 is about 508.4388258232.

The spelling of 131436541 in words is "one hundred thirty-one million, four hundred thirty-six thousand, five hundred forty-one".