531431140 has 96 divisors (see below), whose sum is σ = 1224115200. Its totient is φ = 193052160.

The previous prime is 531431107. The next prime is 531431149. The reversal of 531431140 is 41134135.

It is not an unprimeable number, because it can be changed into a prime (531431149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2320546 + ... + 2320774.

It is an arithmetic number, because the mean of its divisors is an integer number (12751200).

Almost surely, 2^531431140 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 531431140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (612057600).

531431140 is an abundant number, since it is smaller than the sum of its proper divisors (692684060).

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

531431140 is a wasteful number, since it uses less digits than its factorization.

531431140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 531431140 is about 23052.7902866443. The cubic root of 531431140 is about 809.9949905700.

Adding to 531431140 its reverse (41134135), we get a palindrome (572565275).

The spelling of 531431140 in words is "five hundred thirty-one million, four hundred thirty-one thousand, one hundred forty".