538531 has 8 divisors (see below), whose sum is σ = 622080. Its totient is φ = 456648.

The previous prime is 538529. The next prime is 538553. The reversal of 538531 is 135835.

It is a happy number.

538531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 538531 - 2¹ = 538529 is a prime.

It is a super-2 number, since 2×538531² = 580031275922, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 538496 and 538505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390 + ... + 1108.

It is an arithmetic number, because the mean of its divisors is an integer number (77760).

2⁵³⁸⁵³¹ is an apocalyptic number.

538531 is a deficient number, since it is larger than the sum of its proper divisors (83549).

538531 is a wasteful number, since it uses less digits than its factorization.

538531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833.

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

The square root of 538531 is about 733.8467142394. The cubic root of 538531 is about 81.3586192245.

The spelling of 538531 in words is "five hundred thirty-eight thousand, five hundred thirty-one".