531400254440 has 96 divisors (see below), whose sum is σ = 1314593280000. Its totient is φ = 193182675840.

The previous prime is 531400254431. The next prime is 531400254487. The reversal of 531400254440 is 44452004135.

It is a junction number, because it is equal to n+sod(n) for n = 531400254397 and 531400254406.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20116361 + ... + 20142759.

It is an arithmetic number, because the mean of its divisors is an integer number (13693680000).

Almost surely, 2^531400254440 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 531400254440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (657296640000).

531400254440 is an abundant number, since it is smaller than the sum of its proper divisors (783193025560).

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

531400254440 is a wasteful number, since it uses less digits than its factorization.

531400254440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30591 (or 30576 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 531400254440 its reverse (44452004135), we get a palindrome (575852258575).

The spelling of 531400254440 in words is "five hundred thirty-one billion, four hundred million, two hundred fifty-four thousand, four hundred forty".