523081 has 4 divisors (see below), whose sum is σ = 563332. Its totient is φ = 482832.

The previous prime is 523049. The next prime is 523093. The reversal of 523081 is 180325.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 230400 + 292681 = 480^2 + 541^2 .

It is a cyclic number.

It is not a de Polignac number, because 523081 - 2⁵ = 523049 is a prime.

It is a super-2 number, since 2×523081² = 547227465122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523021) 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, 20106 + ... + 20131.

It is an arithmetic number, because the mean of its divisors is an integer number (140833).

2⁵²³⁰⁸¹ is an apocalyptic number.

It is an amenable number.

523081 is a deficient number, since it is larger than the sum of its proper divisors (40251).

523081 is a wasteful number, since it uses less digits than its factorization.

523081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40250.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 523081 is about 723.2433891851. The cubic root of 523081 is about 80.5730212008.

The spelling of 523081 in words is "five hundred twenty-three thousand, eighty-one".