531611 has 2 divisors, whose sum is σ = 531612. Its totient is φ = 531610.

The previous prime is 531589. The next prime is 531613. The reversal of 531611 is 116135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531611 - 2⁶ = 531547 is a prime.

It is a super-2 number, since 2×531611² = 565220510642, which contains 22 as substring.

Together with 531613, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 531611.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 531611.

It is not a weakly prime, because it can be changed into another prime (531613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265805 + 265806.

It is an arithmetic number, because the mean of its divisors is an integer number (265806).

2⁵³¹⁶¹¹ is an apocalyptic number.

531611 is a deficient number, since it is larger than the sum of its proper divisors (1).

531611 is an equidigital number, since it uses as much as digits as its factorization.

531611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90, while the sum is 17.

The square root of 531611 is about 729.1165887566. The cubic root of 531611 is about 81.0086359740.

Adding to 531611 its reverse (116135), we get a palindrome (647746).

The spelling of 531611 in words is "five hundred thirty-one thousand, six hundred eleven".