531214640 has 80 divisors (see below), whose sum is σ = 1426649760. Its totient is φ = 181800960.

The previous prime is 531214627. The next prime is 531214669. The reversal of 531214640 is 46412135.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2795 + ... + 32714.

It is an arithmetic number, because the mean of its divisors is an integer number (17833122).

Almost surely, 2^531214640 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 531214640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (713324880).

531214640 is an abundant number, since it is smaller than the sum of its proper divisors (895435120).

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

531214640 is a wasteful number, since it uses less digits than its factorization.

531214640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35550 (or 35544 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 531214640 is about 23048.0940643690. The cubic root of 531214640 is about 809.8849808739.

Adding to 531214640 its reverse (46412135), we get a palindrome (577626775).

The spelling of 531214640 in words is "five hundred thirty-one million, two hundred fourteen thousand, six hundred forty".