531213 has 8 divisors (see below), whose sum is σ = 715008. Its totient is φ = 350784.

The previous prime is 531203. The next prime is 531229. The reversal of 531213 is 312135.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 531213 - 2⁴ = 531197 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 531192 and 531201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445 + ... + 1122.

It is an arithmetic number, because the mean of its divisors is an integer number (89376).

2⁵³¹²¹³ is an apocalyptic number.

It is an amenable number.

531213 is a deficient number, since it is larger than the sum of its proper divisors (183795).

531213 is a wasteful number, since it uses less digits than its factorization.

531213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683.

The product of its digits is 90, while the sum is 15.

The square root of 531213 is about 728.8436046231. The cubic root of 531213 is about 80.9884147430.

Adding to 531213 its reverse (312135), we get a palindrome (843348).

The spelling of 531213 in words is "five hundred thirty-one thousand, two hundred thirteen".