113521543 has 4 divisors (see below), whose sum is σ = 114582600. Its totient is φ = 112460488.

The previous prime is 113521489. The next prime is 113521607. The reversal of 113521543 is 345125311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113521543 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 (113521843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530368 + ... + 530581.

It is an arithmetic number, because the mean of its divisors is an integer number (28645650).

Almost surely, 2^113521543 is an apocalyptic number.

113521543 is a deficient number, since it is larger than the sum of its proper divisors (1061057).

113521543 is a wasteful number, since it uses less digits than its factorization.

113521543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061056.

The product of its digits is 1800, while the sum is 25.

The square root of 113521543 is about 10654.6488914464. The cubic root of 113521543 is about 484.2014605964.

Adding to 113521543 its reverse (345125311), we get a palindrome (458646854).

The spelling of 113521543 in words is "one hundred thirteen million, five hundred twenty-one thousand, five hundred forty-three".