87318015 has 32 divisors (see below), whose sum is σ = 148108800. Its totient is φ = 43804800.

The previous prime is 87318013. The next prime is 87318017. The reversal of 87318015 is 51081378.

It is an interprime number because it is at equal distance from previous prime (87318013) and next prime (87318017).

It is not a de Polignac number, because 87318015 - 2¹ = 87318013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87318013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42021 + ... + 44049.

It is an arithmetic number, because the mean of its divisors is an integer number (4628400).

Almost surely, 2^87318015 is an apocalyptic number.

87318015 is a deficient number, since it is larger than the sum of its proper divisors (60790785).

87318015 is a wasteful number, since it uses less digits than its factorization.

87318015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 87318015 is about 9344.4108963594. The cubic root of 87318015 is about 443.6440058950.

The spelling of 87318015 in words is "eighty-seven million, three hundred eighteen thousand, fifteen".