531603214391340 has 576 divisors, whose sum is σ = 2100271597441920. Its totient is φ = 110625959485440.

The previous prime is 531603214391339. The next prime is 531603214391377. The reversal of 531603214391340 is 43193412306135.

531603214391340 is a `hidden beast` number, since 5 + 3 + 1 + 6 + 0 + 3 + 214 + 3 + 91 + 340 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 14525280 + ... + 35695800.

It is an arithmetic number, because the mean of its divisors is an integer number (3646304856670).

Almost surely, 2^{531603214391340} 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 531603214391340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1050135798720960).

531603214391340 is an abundant number, since it is smaller than the sum of its proper divisors (1568668383050580).

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

531603214391340 is a wasteful number, since it uses less digits than its factorization.

531603214391340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21170639 (or 21170624 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

Adding to 531603214391340 its reverse (43193412306135), we get a palindrome (574796626697475).

The spelling of 531603214391340 in words is "five hundred thirty-one trillion, six hundred three billion, two hundred fourteen million, three hundred ninety-one thousand, three hundred forty".