531024240 has 160 divisors (see below), whose sum is σ = 1756226880. Its totient is φ = 132268032.

The previous prime is 531024239. The next prime is 531024281. The reversal of 531024240 is 42420135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 640146 + ... + 640974.

It is an arithmetic number, because the mean of its divisors is an integer number (10976418).

Almost surely, 2^531024240 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 531024240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (878113440).

531024240 is an abundant number, since it is smaller than the sum of its proper divisors (1225202640).

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

531024240 is a wasteful number, since it uses less digits than its factorization.

531024240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019 (or 1013 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 531024240 is about 23043.9632008038. The cubic root of 531024240 is about 809.7882086117.

Adding to 531024240 its reverse (42420135), we get a palindrome (573444375).

The spelling of 531024240 in words is "five hundred thirty-one million, twenty-four thousand, two hundred forty".