531903 has 4 divisors (see below), whose sum is σ = 709208. Its totient is φ = 354600.

The previous prime is 531901. The next prime is 531911. The reversal of 531903 is 309135.

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

It is not a de Polignac number, because 531903 - 2¹ = 531901 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 531903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88648 + ... + 88653.

It is an arithmetic number, because the mean of its divisors is an integer number (177302).

2⁵³¹⁹⁰³ is an apocalyptic number.

531903 is a deficient number, since it is larger than the sum of its proper divisors (177305).

531903 is a wasteful number, since it uses less digits than its factorization.

531903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177304.

The product of its (nonzero) digits is 405, while the sum is 21.

The square root of 531903 is about 729.3168035909. The cubic root of 531903 is about 81.0234652333.

The spelling of 531903 in words is "five hundred thirty-one thousand, nine hundred three".