531243232020 has 288 divisors, whose sum is σ = 1694729836800. Its totient is φ = 139676866560.

The previous prime is 531243231997. The next prime is 531243232057. The reversal of 531243232020 is 20232342135.

531243232020 is a `hidden beast` number, since 5 + 312 + 4 + 3 + 2 + 320 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 109284390 + ... + 109289250.

It is an arithmetic number, because the mean of its divisors is an integer number (5884478600).

Almost surely, 2^531243232020 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 531243232020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (847364918400).

531243232020 is an abundant number, since it is smaller than the sum of its proper divisors (1163486604780).

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

531243232020 is a wasteful number, since it uses less digits than its factorization.

531243232020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197 (or 5183 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 531243232020 its reverse (20232342135), we get a palindrome (551475574155).

The spelling of 531243232020 in words is "five hundred thirty-one billion, two hundred forty-three million, two hundred thirty-two thousand, twenty".