531238 has 4 divisors (see below), whose sum is σ = 796860. Its totient is φ = 265618.

The previous prime is 531229. The next prime is 531239. The reversal of 531238 is 832135.

It is a semiprime because it is the product of two primes.

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 (531239) by changing a digit.

531238 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 as a sum of consecutive naturals, namely, 132808 + ... + 132811.

It is an arithmetic number, because the mean of its divisors is an integer number (199215).

2⁵³¹²³⁸ is an apocalyptic number.

531238 is a deficient number, since it is larger than the sum of its proper divisors (265622).

531238 is a wasteful number, since it uses less digits than its factorization.

531238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265621.

The product of its digits is 720, while the sum is 22.

The square root of 531238 is about 728.8607548771. The cubic root of 531238 is about 80.9896852181.

The spelling of 531238 in words is "five hundred thirty-one thousand, two hundred thirty-eight".