531532040 has 96 divisors (see below), whose sum is σ = 1317270600. Its totient is φ = 192890880.

The previous prime is 531532019. The next prime is 531532051. The reversal of 531532040 is 40235135.

It can be written as a sum of positive squares in 12 ways, for example, as 21585316 + 509946724 = 4646^2 + 22582^2 .

It is a junction number, because it is equal to n+sod(n) for n = 531531997 and 531532015.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 411716 + ... + 413004.

Almost surely, 2^531532040 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 531532040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (658635300).

531532040 is an abundant number, since it is smaller than the sum of its proper divisors (785738560).

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

531532040 is a wasteful number, since it uses less digits than its factorization.

531532040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387 (or 1370 counting only the distinct ones).

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

The square root of 531532040 is about 23054.9786380296. The cubic root of 531532040 is about 810.0462504709.

Adding to 531532040 its reverse (40235135), we get a palindrome (571767175).

The spelling of 531532040 in words is "five hundred thirty-one million, five hundred thirty-two thousand, forty".