531220 has 12 divisors (see below), whose sum is σ = 1115604. Its totient is φ = 212480.

The previous prime is 531203. The next prime is 531229. The reversal of 531220 is 22135.

It can be written as a sum of positive squares in 2 ways, for example, as 334084 + 197136 = 578^2 + 444^2 .

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 531220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531229) by changing a digit.

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, 13261 + ... + 13300.

It is an arithmetic number, because the mean of its divisors is an integer number (92967).

2⁵³¹²²⁰ is an apocalyptic number.

It is an amenable number.

531220 is an abundant number, since it is smaller than the sum of its proper divisors (584384).

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

531220 is a wasteful number, since it uses less digits than its factorization.

531220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26570 (or 26568 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 531220 is about 728.8484067349. The cubic root of 531220 is about 80.9887704800.

Adding to 531220 its reverse (22135), we get a palindrome (553355).

The spelling of 531220 in words is "five hundred thirty-one thousand, two hundred twenty".