531085866 has 8 divisors (see below), whose sum is σ = 1062171744. Its totient is φ = 177028620.

The previous prime is 531085837. The next prime is 531085871. The reversal of 531085866 is 668580135.

It is a sphenic number, since it is the product of 3 distinct primes.

531085866 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44257150 + ... + 44257161.

It is an arithmetic number, because the mean of its divisors is an integer number (132771468).

Almost surely, 2^531085866 is an apocalyptic number.

531085866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

531085866 is a wasteful number, since it uses less digits than its factorization.

531085866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88514316.

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

The square root of 531085866 is about 23045.3003017969. The cubic root of 531085866 is about 809.8195330310.

The spelling of 531085866 in words is "five hundred thirty-one million, eighty-five thousand, eight hundred sixty-six".