113531503 has 4 divisors (see below), whose sum is σ = 116599960. Its totient is φ = 110463048.

The previous prime is 113531471. The next prime is 113531513. The reversal of 113531503 is 305135311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305135311 = 13 ⋅23471947.

It is a cyclic number.

It is not a de Polignac number, because 113531503 - 2⁵ = 113531471 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 (113531513) 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, 1534173 + ... + 1534246.

It is an arithmetic number, because the mean of its divisors is an integer number (29149990).

Almost surely, 2^113531503 is an apocalyptic number.

113531503 is a deficient number, since it is larger than the sum of its proper divisors (3068457).

113531503 is an equidigital number, since it uses as much as digits as its factorization.

113531503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068456.

The product of its (nonzero) digits is 675, while the sum is 22.

The square root of 113531503 is about 10655.1162828005. The cubic root of 113531503 is about 484.2156209205.

Adding to 113531503 its reverse (305135311), we get a palindrome (418666814).

The spelling of 113531503 in words is "one hundred thirteen million, five hundred thirty-one thousand, five hundred three".