531321113441240 has 32 divisors (see below), whose sum is σ = 1196033496755760. Its totient is φ = 212428713552000.

The previous prime is 531321113441213. The next prime is 531321113441243. The reversal of 531321113441240 is 42144311123135.

It is a self number, because there is not a number n which added to its sum of digits gives 531321113441240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531321113441243) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3116533211 + ... + 3116703690.

Almost surely, 2^{531321113441240} is an apocalyptic number.

It is an amenable number.

531321113441240 is an abundant number, since it is smaller than the sum of its proper divisors (664712383314520).

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

531321113441240 is a wasteful number, since it uses less digits than its factorization.

531321113441240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6233239043 (or 6233239039 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 531321113441240 its reverse (42144311123135), we get a palindrome (573465424564375).

The spelling of 531321113441240 in words is "five hundred thirty-one trillion, three hundred twenty-one billion, one hundred thirteen million, four hundred forty-one thousand, two hundred forty".