87317555 has 16 divisors (see below), whose sum is σ = 113280384. Its totient is φ = 64229760.

The previous prime is 87317551. The next prime is 87317599. The reversal of 87317555 is 55571378.

It is not a de Polignac number, because 87317555 - 2² = 87317551 is a prime.

It is a super-2 number, since 2×87317555² = 15248710822356050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87317551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15137 + ... + 20093.

It is an arithmetic number, because the mean of its divisors is an integer number (7080024).

Almost surely, 2^87317555 is an apocalyptic number.

87317555 is a deficient number, since it is larger than the sum of its proper divisors (25962829).

87317555 is a wasteful number, since it uses less digits than its factorization.

87317555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5246.

The product of its digits is 147000, while the sum is 41.

The square root of 87317555 is about 9344.3862826833. The cubic root of 87317555 is about 443.6432268400.

The spelling of 87317555 in words is "eighty-seven million, three hundred seventeen thousand, five hundred fifty-five".