531013440 has 56 divisors (see below), whose sum is σ = 1685970720. Its totient is φ = 141603328.

The previous prime is 531013421. The next prime is 531013451. The reversal of 531013440 is 44310135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275610 + ... + 277529.

It is an arithmetic number, because the mean of its divisors is an integer number (30106620).

Almost surely, 2^531013440 is an apocalyptic number.

It is an amenable number.

531013440 is an abundant number, since it is smaller than the sum of its proper divisors (1154957280).

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

531013440 is a wasteful number, since it uses less digits than its factorization.

531013440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553159 (or 553149 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 531013440 is about 23043.7288649211. The cubic root of 531013440 is about 809.7827187355.

Adding to 531013440 its reverse (44310135), we get a palindrome (575323575).

The spelling of 531013440 in words is "five hundred thirty-one million, thirteen thousand, four hundred forty".