531213340203440 has 80 divisors (see below), whose sum is σ = 1252149049810848. Its totient is φ = 209547920222208.

The previous prime is 531213340203331. The next prime is 531213340203451. The reversal of 531213340203440 is 44302043312135.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×531213340203440² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 531213340203440.

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, 40162094 + ... + 51724466.

Almost surely, 2^{531213340203440} 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 531213340203440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (626074524905424).

531213340203440 is an abundant number, since it is smaller than the sum of its proper divisors (720935709607408).

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

531213340203440 is a wasteful number, since it uses less digits than its factorization.

531213340203440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11570326 (or 11570320 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

Adding to 531213340203440 its reverse (44302043312135), we get a palindrome (575515383515575).

The spelling of 531213340203440 in words is "five hundred thirty-one trillion, two hundred thirteen billion, three hundred forty million, two hundred three thousand, four hundred forty".