87544431 has 24 divisors (see below), whose sum is σ = 139355216. Its totient is φ = 52617600.

The previous prime is 87544423. The next prime is 87544453. The reversal of 87544431 is 13444578.

87544431 is a `hidden beast` number, since 87 + 544 + 4 + 31 = 666.

It is not a de Polignac number, because 87544431 - 2³ = 87544423 is a prime.

It is a super-3 number, since 3×87544431³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87544531) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 3670 + ... + 13731.

Almost surely, 2^87544431 is an apocalyptic number.

87544431 is a deficient number, since it is larger than the sum of its proper divisors (51810785).

87544431 is a wasteful number, since it uses less digits than its factorization.

87544431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17463 (or 17460 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 87544431 is about 9356.5181023712. The cubic root of 87544431 is about 444.0271318945.

The spelling of 87544431 in words is "eighty-seven million, five hundred forty-four thousand, four hundred thirty-one".