531421115424 has 96 divisors (see below), whose sum is σ = 1458599353344. Its totient is φ = 169093182720.

The previous prime is 531421115419. The next prime is 531421115443. The reversal of 531421115424 is 424511124135.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×531421115424³ (a number of 36 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 839037 + ... + 1329219.

It is an arithmetic number, because the mean of its divisors is an integer number (15193743264).

Almost surely, 2^531421115424 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 531421115424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (729299676672).

531421115424 is an abundant number, since it is smaller than the sum of its proper divisors (927178237920).

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

531421115424 is a wasteful number, since it uses less digits than its factorization.

531421115424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490710 (or 490702 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

Adding to 531421115424 its reverse (424511124135), we get a palindrome (955932239559).

The spelling of 531421115424 in words is "five hundred thirty-one billion, four hundred twenty-one million, one hundred fifteen thousand, four hundred twenty-four".