531243244220 has 24 divisors (see below), whose sum is σ = 1201427029824. Its totient is φ = 196151351616.

The previous prime is 531243244163. The next prime is 531243244237. The reversal of 531243244220 is 22442342135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1021621364 + ... + 1021621883.

It is an arithmetic number, because the mean of its divisors is an integer number (50059459576).

Almost surely, 2^531243244220 is an apocalyptic number.

It is an amenable number.

531243244220 is an abundant number, since it is smaller than the sum of its proper divisors (670183785604).

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

531243244220 is a wasteful number, since it uses less digits than its factorization.

531243244220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043243269 (or 2043243267 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 531243244220 its reverse (22442342135), we get a palindrome (553685586355).

The spelling of 531243244220 in words is "five hundred thirty-one billion, two hundred forty-three million, two hundred forty-four thousand, two hundred twenty".