87281551 has 8 divisors (see below), whose sum is σ = 99870624. Its totient is φ = 74722560.

The previous prime is 87281549. The next prime is 87281563. The reversal of 87281551 is 15518278.

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

It is a cyclic number.

It is not a de Polignac number, because 87281551 - 2¹ = 87281549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87281551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87281521) 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 7 ways as a sum of consecutive naturals, for example, 910 + ... + 13243.

It is an arithmetic number, because the mean of its divisors is an integer number (12483828).

Almost surely, 2^87281551 is an apocalyptic number.

87281551 is a deficient number, since it is larger than the sum of its proper divisors (12589073).

87281551 is a wasteful number, since it uses less digits than its factorization.

87281551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15041.

The product of its digits is 22400, while the sum is 37.

The square root of 87281551 is about 9342.4595797895. The cubic root of 87281551 is about 443.5822420563.

The spelling of 87281551 in words is "eighty-seven million, two hundred eighty-one thousand, five hundred fifty-one".