531540312031 has 8 divisors (see below), whose sum is σ = 542909898800. Its totient is φ = 520271788608.

The previous prime is 531540312013. The next prime is 531540312041. The reversal of 531540312031 is 130213045135.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 531540312031 - 2¹⁹ = 531539787743 is a prime.

It is a super-2 number, since 2×531540312031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531540312041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25255206 + ... + 25276243.

It is an arithmetic number, because the mean of its divisors is an integer number (67863737350).

Almost surely, 2^531540312031 is an apocalyptic number.

531540312031 is a deficient number, since it is larger than the sum of its proper divisors (11369586769).

531540312031 is a wasteful number, since it uses less digits than its factorization.

531540312031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50531673.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 531540312031 its reverse (130213045135), we get a palindrome (661753357166).

The spelling of 531540312031 in words is "five hundred thirty-one billion, five hundred forty million, three hundred twelve thousand, thirty-one".