531340311 has 16 divisors (see below), whose sum is σ = 725326848. Its totient is φ = 345828000.

The previous prime is 531340307. The next prime is 531340343. The reversal of 531340311 is 113043135.

It is not a de Polignac number, because 531340311 - 2² = 531340307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531341311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54886 + ... + 63836.

It is an arithmetic number, because the mean of its divisors is an integer number (45332928).

Almost surely, 2^531340311 is an apocalyptic number.

531340311 is a deficient number, since it is larger than the sum of its proper divisors (193986537).

531340311 is a wasteful number, since it uses less digits than its factorization.

531340311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9422.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 531340311 is about 23050.8201806357. The cubic root of 531340311 is about 809.9488414573.

Adding to 531340311 its reverse (113043135), we get a palindrome (644383446).

The spelling of 531340311 in words is "five hundred thirty-one million, three hundred forty thousand, three hundred eleven".