531330 has 32 divisors (see below), whose sum is σ = 1296000. Its totient is φ = 139392.

The previous prime is 531299. The next prime is 531331. The reversal of 531330 is 33135.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (531331) by changing a digit.

531330 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 15 ways as a sum of consecutive naturals, for example, 2571 + ... + 2769.

It is an arithmetic number, because the mean of its divisors is an integer number (40500).

2⁵³¹³³⁰ is an apocalyptic number.

531330 is an abundant number, since it is smaller than the sum of its proper divisors (764670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531330 is a wasteful number, since it uses less digits than its factorization.

531330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298.

The product of its (nonzero) digits is 135, while the sum is 15.

The square root of 531330 is about 728.9238643370. The cubic root of 531330 is about 80.9943602231.

Adding to 531330 its reverse (33135), we get a palindrome (564465).

It can be divided in two parts, 531 and 330, that added together give a triangular number (861 = T₄₁).

The spelling of 531330 in words is "five hundred thirty-one thousand, three hundred thirty".