531501040 has 120 divisors (see below), whose sum is σ = 1472999472. Its totient is φ = 177730560.

The previous prime is 531501023. The next prime is 531501053. The reversal of 531501040 is 40105135.

It is a junction number, because it is equal to n+sod(n) for n = 531500999 and 531501017.

It is a congruent number.

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, 159067 + ... + 162373.

Almost surely, 2^531501040 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 531501040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (736499736).

531501040 is an abundant number, since it is smaller than the sum of its proper divisors (941498432).

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

531501040 is a wasteful number, since it uses less digits than its factorization.

531501040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375 (or 3362 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 531501040 is about 23054.3063222470. The cubic root of 531501040 is about 810.0305023315.

Adding to 531501040 its reverse (40105135), we get a palindrome (571606175).

The spelling of 531501040 in words is "five hundred thirty-one million, five hundred one thousand, forty".