531042631540 has 12 divisors (see below), whose sum is σ = 1115189526276. Its totient is φ = 212417052608.

The previous prime is 531042631531. The next prime is 531042631577. The reversal of 531042631540 is 45136240135.

It can be written as a sum of positive squares in 2 ways, for example, as 88248208356 + 442794423184 = 297066^2 + 665428^2 .

It is a junction number, because it is equal to n+sod(n) for n = 531042631496 and 531042631505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13276065769 + ... + 13276065808.

It is an arithmetic number, because the mean of its divisors is an integer number (92932460523).

Almost surely, 2^531042631540 is an apocalyptic number.

It is an amenable number.

531042631540 is an abundant number, since it is smaller than the sum of its proper divisors (584146894736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531042631540 is a wasteful number, since it uses less digits than its factorization.

531042631540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26552131586 (or 26552131584 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 531042631540 its reverse (45136240135), we get a palindrome (576178871675).

The spelling of 531042631540 in words is "five hundred thirty-one billion, forty-two million, six hundred thirty-one thousand, five hundred forty".