531440015020 has 12 divisors (see below), whose sum is σ = 1116024031584. Its totient is φ = 212576006000.

The previous prime is 531440015009. The next prime is 531440015023. The reversal of 531440015020 is 20510044135.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (531440015023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13286000356 + ... + 13286000395.

It is an arithmetic number, because the mean of its divisors is an integer number (93002002632).

Almost surely, 2^531440015020 is an apocalyptic number.

It is an amenable number.

531440015020 is an abundant number, since it is smaller than the sum of its proper divisors (584584016564).

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

531440015020 is a wasteful number, since it uses less digits than its factorization.

531440015020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26572000760 (or 26572000758 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 531440015020 its reverse (20510044135), we get a palindrome (551950059155).

The spelling of 531440015020 in words is "five hundred thirty-one billion, four hundred forty million, fifteen thousand, twenty".