523555 has 4 divisors (see below), whose sum is σ = 628272. Its totient is φ = 418840.

The previous prime is 523553. The next prime is 523571. The reversal of 523555 is 555325.

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

It is not a de Polignac number, because 523555 - 2¹ = 523553 is a prime.

It is an Ulam number.

It is a Duffinian number.

523555 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (523553) 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, 52351 + ... + 52360.

It is an arithmetic number, because the mean of its divisors is an integer number (157068).

2⁵²³⁵⁵⁵ is an apocalyptic number.

523555 is a deficient number, since it is larger than the sum of its proper divisors (104717).

523555 is a wasteful number, since it uses less digits than its factorization.

523555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104716.

The product of its digits is 3750, while the sum is 25.

The square root of 523555 is about 723.5710054998. The cubic root of 523555 is about 80.5973514555.

The spelling of 523555 in words is "five hundred twenty-three thousand, five hundred fifty-five".