531613 has 2 divisors, whose sum is σ = 531614. Its totient is φ = 531612.

The previous prime is 531611. The next prime is 531623. The reversal of 531613 is 316135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 492804 + 38809 = 702^2 + 197^2 .

It is a cyclic number.

It is not a de Polignac number, because 531613 - 2¹ = 531611 is a prime.

It is a super-2 number, since 2×531613² = 565224763538, which contains 22 as substring.

Together with 531611, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 5³ + 3² + 6² + 1 + 1 + 3¹² .

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265806 + 265807.

It is an arithmetic number, because the mean of its divisors is an integer number (265807).

2⁵³¹⁶¹³ is an apocalyptic number.

It is an amenable number.

531613 is a deficient number, since it is larger than the sum of its proper divisors (1).

531613 is an equidigital number, since it uses as much as digits as its factorization.

531613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 19.

The square root of 531613 is about 729.1179602780. The cubic root of 531613 is about 81.0087375627.

Adding to 531613 its reverse (316135), we get a palindrome (847748).

It can be divided in two parts, 5316 and 13, that added together give a square (5329 = 73²).

The spelling of 531613 in words is "five hundred thirty-one thousand, six hundred thirteen".