531306 has 16 divisors (see below), whose sum is σ = 1180800. Its totient is φ = 177084.

The previous prime is 531299. The next prime is 531331. The reversal of 531306 is 603135.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 3 and base 9.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

531306 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, 4866 + ... + 4973.

It is an arithmetic number, because the mean of its divisors is an integer number (73800).

2⁵³¹³⁰⁶ is an apocalyptic number.

531306 is an abundant number, since it is smaller than the sum of its proper divisors (649494).

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

531306 is a wasteful number, since it uses less digits than its factorization.

531306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9850 (or 9844 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 531306 is about 728.9074015264. The cubic root of 531306 is about 80.9931407086.

The spelling of 531306 in words is "five hundred thirty-one thousand, three hundred six".