531228 has 12 divisors (see below), whose sum is σ = 1239560. Its totient is φ = 177072.

The previous prime is 531203. The next prime is 531229. The reversal of 531228 is 822135.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nialpdrome in base 9.

It is a congruent number.

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

531228 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 3 ways as a sum of consecutive naturals, for example, 22123 + ... + 22146.

2⁵³¹²²⁸ is an apocalyptic number.

It is an amenable number.

531228 is an abundant number, since it is smaller than the sum of its proper divisors (708332).

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

531228 is a wasteful number, since it uses less digits than its factorization.

531228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44276 (or 44274 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 531228 is about 728.8538948239. The cubic root of 531228 is about 80.9891770328.

The spelling of 531228 in words is "five hundred thirty-one thousand, two hundred twenty-eight".