531066388 has 24 divisors (see below), whose sum is σ = 949102112. Its totient is φ = 259943904.

The previous prime is 531066379. The next prime is 531066433. The reversal of 531066388 is 883660135.

It is a self number, because there is not a number n which added to its sum of digits gives 531066388.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37606 + ... + 49762.

Almost surely, 2^531066388 is an apocalyptic number.

It is an amenable number.

531066388 is a deficient number, since it is larger than the sum of its proper divisors (418035724).

531066388 is a wasteful number, since it uses less digits than its factorization.

531066388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12391 (or 12389 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 531066388 is about 23044.8776954880. The cubic root of 531066388 is about 809.8096326497.

The spelling of 531066388 in words is "five hundred thirty-one million, sixty-six thousand, three hundred eighty-eight".