531538 has 8 divisors (see below), whose sum is σ = 911232. Its totient is φ = 227796.

The previous prime is 531521. The next prime is 531547. The reversal of 531538 is 835135.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18970 + ... + 18997.

It is an arithmetic number, because the mean of its divisors is an integer number (113904).

2⁵³¹⁵³⁸ is an apocalyptic number.

531538 is a deficient number, since it is larger than the sum of its proper divisors (379694).

531538 is a wasteful number, since it uses less digits than its factorization.

531538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37976.

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

The square root of 531538 is about 729.0665264569. The cubic root of 531538 is about 81.0049278108.

The spelling of 531538 in words is "five hundred thirty-one thousand, five hundred thirty-eight".