531540435244 has 72 divisors (see below), whose sum is σ = 1168328732928. Its totient is φ = 207141105600.

The previous prime is 531540435203. The next prime is 531540435263. The reversal of 531540435244 is 442534045135.

It is a junction number, because it is equal to n+sod(n) for n = 531540435197 and 531540435206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 521232 + ... + 1155319.

Almost surely, 2^531540435244 is an apocalyptic number.

It is an amenable number.

531540435244 is an abundant number, since it is smaller than the sum of its proper divisors (636788297684).

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

531540435244 is a wasteful number, since it uses less digits than its factorization.

531540435244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676655 (or 1676640 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 40.

The spelling of 531540435244 in words is "five hundred thirty-one billion, five hundred forty million, four hundred thirty-five thousand, two hundred forty-four".