531450324205240 has 128 divisors (see below), whose sum is σ = 1320210066309120. Its totient is φ = 190922736985600.

The previous prime is 531450324205217. The next prime is 531450324205259. The reversal of 531450324205240 is 42502423054135.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 531450324205193 and 531450324205202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2692411350 + ... + 2692608730.

It is an arithmetic number, because the mean of its divisors is an integer number (10314141143040).

Almost surely, 2^{531450324205240} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531450324205240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660105033154560).

531450324205240 is an abundant number, since it is smaller than the sum of its proper divisors (788759742103880).

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

531450324205240 is a wasteful number, since it uses less digits than its factorization.

531450324205240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271213 (or 271209 counting only the distinct ones).

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

Adding to 531450324205240 its reverse (42502423054135), we get a palindrome (573952747259375).

The spelling of 531450324205240 in words is "five hundred thirty-one trillion, four hundred fifty billion, three hundred twenty-four million, two hundred five thousand, two hundred forty".