531031 has 6 divisors (see below), whose sum is σ = 560832. Its totient is φ = 502740.

The previous prime is 531023. The next prime is 531043. The reversal of 531031 is 130135.

It is not a de Polignac number, because 531031 - 2³ = 531023 is a prime.

It is a super-2 number, since 2×531031² = 563987845922, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 375 + ... + 1096.

It is an arithmetic number, because the mean of its divisors is an integer number (93472).

2⁵³¹⁰³¹ is an apocalyptic number.

531031 is a deficient number, since it is larger than the sum of its proper divisors (29801).

531031 is a wasteful number, since it uses less digits than its factorization.

531031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509 (or 1490 counting only the distinct ones).

The product of its (nonzero) digits is 45, while the sum is 13.

The square root of 531031 is about 728.7187386091. The cubic root of 531031 is about 80.9791644830.

Adding to 531031 its reverse (130135), we get a palindrome (661166).

The spelling of 531031 in words is "five hundred thirty-one thousand, thirty-one".