531138304 has 36 divisors (see below), whose sum is σ = 1064760480. Its totient is φ = 264427520.

The previous prime is 531138301. The next prime is 531138317. The reversal of 531138304 is 403831135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531138301) 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, 56844 + ... + 65524.

It is an arithmetic number, because the mean of its divisors is an integer number (29576680).

Almost surely, 2^531138304 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 531138304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (532380240).

531138304 is an abundant number, since it is smaller than the sum of its proper divisors (533622176).

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

531138304 is an equidigital number, since it uses as much as digits as its factorization.

531138304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8936 (or 8922 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 531138304 is about 23046.4379894161. The cubic root of 531138304 is about 809.8461852931.

Adding to 531138304 its reverse (403831135), we get a palindrome (934969439).

The spelling of 531138304 in words is "five hundred thirty-one million, one hundred thirty-eight thousand, three hundred four".