87215118 has 16 divisors (see below), whose sum is σ = 178685136. Its totient is φ = 28362560.

The previous prime is 87215113. The next prime is 87215123. The reversal of 87215118 is 81151278.

It is an interprime number because it is at equal distance from previous prime (87215113) and next prime (87215123).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87215113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177021 + ... + 177512.

It is an arithmetic number, because the mean of its divisors is an integer number (11167821).

Almost surely, 2^87215118 is an apocalyptic number.

87215118 is an abundant number, since it is smaller than the sum of its proper divisors (91470018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87215118 is a wasteful number, since it uses less digits than its factorization.

87215118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354579.

The product of its digits is 4480, while the sum is 33.

The square root of 87215118 is about 9338.9034688233. The cubic root of 87215118 is about 443.4696715744.

The spelling of 87215118 in words is "eighty-seven million, two hundred fifteen thousand, one hundred eighteen".