531286 has 16 divisors (see below), whose sum is σ = 920736. Its totient is φ = 225216.

The previous prime is 531281. The next prime is 531287. The reversal of 531286 is 682135.

It is a happy number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 531286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531281) by changing a digit.

531286 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1780 + ... + 2056.

It is an arithmetic number, because the mean of its divisors is an integer number (57546).

2⁵³¹²⁸⁶ is an apocalyptic number.

531286 is a deficient number, since it is larger than the sum of its proper divisors (389450).

531286 is a wasteful number, since it uses less digits than its factorization.

531286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423.

The product of its digits is 1440, while the sum is 25.

The square root of 531286 is about 728.8936822336. The cubic root of 531286 is about 80.9921244185.

The spelling of 531286 in words is "five hundred thirty-one thousand, two hundred eighty-six".