531323363240 has 32 divisors (see below), whose sum is σ = 1195590019680. Its totient is φ = 212509353792.

The previous prime is 531323363213. The next prime is 531323363243. The reversal of 531323363240 is 42363323135.

It is a self number, because there is not a number n which added to its sum of digits gives 531323363240.

It is not an unprimeable number, because it can be changed into a prime (531323363243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190454 + ... + 1048293.

It is an arithmetic number, because the mean of its divisors is an integer number (37362188115).

Almost surely, 2^531323363240 is an apocalyptic number.

It is an amenable number.

531323363240 is an abundant number, since it is smaller than the sum of its proper divisors (664266656440).

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

531323363240 is a wasteful number, since it uses less digits than its factorization.

531323363240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249481 (or 1249477 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 35.

Adding to 531323363240 its reverse (42363323135), we get a palindrome (573686686375).

The spelling of 531323363240 in words is "five hundred thirty-one billion, three hundred twenty-three million, three hundred sixty-three thousand, two hundred forty".