130505523 has 4 divisors (see below), whose sum is σ = 174007368. Its totient is φ = 87003680.

The previous prime is 130505513. The next prime is 130505527. The reversal of 130505523 is 325505031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325505031 = 3 ⋅108501677.

It is a cyclic number.

It is not a de Polignac number, because 130505523 - 2⁸ = 130505267 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 130505493 and 130505502.

It is not an unprimeable number, because it can be changed into a prime (130505527) 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, 21750918 + ... + 21750923.

It is an arithmetic number, because the mean of its divisors is an integer number (43501842).

Almost surely, 2^130505523 is an apocalyptic number.

130505523 is a deficient number, since it is larger than the sum of its proper divisors (43501845).

130505523 is an equidigital number, since it uses as much as digits as its factorization.

130505523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43501844.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 130505523 is about 11423.9013913811. The cubic root of 130505523 is about 507.2354877095.

The spelling of 130505523 in words is "one hundred thirty million, five hundred five thousand, five hundred twenty-three".