87315205 has 8 divisors (see below), whose sum is σ = 104839704. Its totient is φ = 69811200.

The previous prime is 87315187. The next prime is 87315209. The reversal of 87315205 is 50251378.

It can be written as a sum of positive squares in 4 ways, for example, as 7873636 + 79441569 = 2806^2 + 8913^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-87315205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87315209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6765 + ... + 14845.

It is an arithmetic number, because the mean of its divisors is an integer number (13104963).

Almost surely, 2^87315205 is an apocalyptic number.

It is an amenable number.

87315205 is a deficient number, since it is larger than the sum of its proper divisors (17524499).

87315205 is a wasteful number, since it uses less digits than its factorization.

87315205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10247.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 87315205 is about 9344.2605378917. The cubic root of 87315205 is about 443.6392468426.

The spelling of 87315205 in words is "eighty-seven million, three hundred fifteen thousand, two hundred five".