531711631 has 12 divisors (see below), whose sum is σ = 609857136. Its totient is φ = 462355520.

The previous prime is 531711629. The next prime is 531711683. The reversal of 531711631 is 136117135.

It is not a de Polignac number, because 531711631 - 2¹ = 531711629 is a prime.

It is a super-2 number, since 2×531711631² = 565434517081360322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 531711631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531711331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92746 + ... + 98311.

It is an arithmetic number, because the mean of its divisors is an integer number (50821428).

Almost surely, 2^531711631 is an apocalyptic number.

531711631 is a deficient number, since it is larger than the sum of its proper divisors (78145505).

531711631 is a wasteful number, since it uses less digits than its factorization.

531711631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191102 (or 191091 counting only the distinct ones).

The product of its digits is 1890, while the sum is 28.

The square root of 531711631 is about 23058.8731511321. The cubic root of 531711631 is about 810.1374714598.

Adding to 531711631 its reverse (136117135), we get a palindrome (667828766).

The spelling of 531711631 in words is "five hundred thirty-one million, seven hundred eleven thousand, six hundred thirty-one".