531311 has 6 divisors (see below), whose sum is σ = 584136. Its totient is φ = 482900.

The previous prime is 531299. The next prime is 531331. The reversal of 531311 is 113135.

It is not a de Polignac number, because 531311 - 2¹⁸ = 269167 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2075 + ... + 2316.

It is an arithmetic number, because the mean of its divisors is an integer number (97356).

2⁵³¹³¹¹ is an apocalyptic number.

531311 is a deficient number, since it is larger than the sum of its proper divisors (52825).

531311 is a wasteful number, since it uses less digits than its factorization.

531311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4413 (or 4402 counting only the distinct ones).

The product of its digits is 45, while the sum is 14.

The square root of 531311 is about 728.9108313093. The cubic root of 531311 is about 80.9933947771.

Adding to 531311 its reverse (113135), we get a palindrome (644446).

The spelling of 531311 in words is "five hundred thirty-one thousand, three hundred eleven".