531381872 has 30 divisors (see below), whose sum is σ = 1197644328. Its totient is φ = 227734752.

The previous prime is 531381863. The next prime is 531381889. The reversal of 531381872 is 278183135.

It is a happy number.

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 5 ways as a sum of consecutive naturals, for example, 338108 + ... + 339675.

Almost surely, 2^531381872 is an apocalyptic number.

It is an amenable number.

531381872 is an abundant number, since it is smaller than the sum of its proper divisors (666262456).

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

531381872 is a wasteful number, since it uses less digits than its factorization.

531381872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677805 (or 677792 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 531381872 is about 23051.7216710596. The cubic root of 531381872 is about 809.9699587497.

The spelling of 531381872 in words is "five hundred thirty-one million, three hundred eighty-one thousand, eight hundred seventy-two".