531413440 has 28 divisors (see below), whose sum is σ = 1265429016. Its totient is φ = 212565248.

The previous prime is 531413383. The next prime is 531413447. The reversal of 531413440 is 44314135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531413447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 830014 + ... + 830653.

Almost surely, 2^531413440 is an apocalyptic number.

It is an amenable number.

531413440 is an abundant number, since it is smaller than the sum of its proper divisors (734015576).

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

531413440 is a wasteful number, since it uses less digits than its factorization.

531413440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660684 (or 1660674 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 531413440 is about 23052.4063819810. The cubic root of 531413440 is about 809.9859978274.

Adding to 531413440 its reverse (44314135), we get a palindrome (575727575).

The spelling of 531413440 in words is "five hundred thirty-one million, four hundred thirteen thousand, four hundred forty".