531343240 has 32 divisors (see below), whose sum is σ = 1247503680. Its totient is φ = 203296192.

The previous prime is 531343237. The next prime is 531343247. The reversal of 531343240 is 42343135.

It is not an unprimeable number, because it can be changed into a prime (531343247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287854 + ... + 289693.

It is an arithmetic number, because the mean of its divisors is an integer number (38984490).

Almost surely, 2^531343240 is an apocalyptic number.

It is an amenable number.

531343240 is an abundant number, since it is smaller than the sum of its proper divisors (716160440).

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

531343240 is a wasteful number, since it uses less digits than its factorization.

531343240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577581 (or 577577 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 531343240 is about 23050.8837140792. The cubic root of 531343240 is about 809.9503297287.

Adding to 531343240 its reverse (42343135), we get a palindrome (573686375).

The spelling of 531343240 in words is "five hundred thirty-one million, three hundred forty-three thousand, two hundred forty".