531065868 has 12 divisors (see below), whose sum is σ = 1239153720. Its totient is φ = 177021952.

The previous prime is 531065861. The next prime is 531065897. The reversal of 531065868 is 868560135.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (531065861) 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, 22127733 + ... + 22127756.

It is an arithmetic number, because the mean of its divisors is an integer number (103262810).

Almost surely, 2^531065868 is an apocalyptic number.

It is an amenable number.

531065868 is an abundant number, since it is smaller than the sum of its proper divisors (708087852).

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

531065868 is a wasteful number, since it uses less digits than its factorization.

531065868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44255496 (or 44255494 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 531065868 is about 23044.8664131515. The cubic root of 531065868 is about 809.8093683380.

The spelling of 531065868 in words is "five hundred thirty-one million, sixty-five thousand, eight hundred sixty-eight".