531230540 has 24 divisors (see below), whose sum is σ = 1164088800. Its totient is φ = 203253248.

The previous prime is 531230527. The next prime is 531230549. The reversal of 531230540 is 45032135.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (531230549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 576965 + ... + 577884.

It is an arithmetic number, because the mean of its divisors is an integer number (48503700).

Almost surely, 2^531230540 is an apocalyptic number.

It is an amenable number.

531230540 is an abundant number, since it is smaller than the sum of its proper divisors (632858260).

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

531230540 is a wasteful number, since it uses less digits than its factorization.

531230540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154881 (or 1154879 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 531230540 is about 23048.4389926954. The cubic root of 531230540 is about 809.8930611248.

Adding to 531230540 its reverse (45032135), we get a palindrome (576262675).

The spelling of 531230540 in words is "five hundred thirty-one million, two hundred thirty thousand, five hundred forty".