531400505540 has 192 divisors, whose sum is σ = 1223383392000. Its totient is φ = 193203118080.

The previous prime is 531400505453. The next prime is 531400505567. The reversal of 531400505540 is 45505004135.

It is a junction number, because it is equal to n+sod(n) for n = 531400505497 and 531400505506.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 749506706 + ... + 749507414.

It is an arithmetic number, because the mean of its divisors is an integer number (6371788500).

Almost surely, 2^531400505540 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 531400505540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (611691696000).

531400505540 is an abundant number, since it is smaller than the sum of its proper divisors (691982886460).

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

531400505540 is a wasteful number, since it uses less digits than its factorization.

531400505540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510 (or 1508 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 32.

Adding to 531400505540 its reverse (45505004135), we get a palindrome (576905509675).

The spelling of 531400505540 in words is "five hundred thirty-one billion, four hundred million, five hundred five thousand, five hundred forty".