87182171 has 4 divisors (see below), whose sum is σ = 92310552. Its totient is φ = 82053792.

The previous prime is 87182143. The next prime is 87182201. The reversal of 87182171 is 17128178.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17128178 = 2 ⋅8564089.

It is a cyclic number.

It is not a de Polignac number, because 87182171 - 2²² = 82987867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87182131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2564165 + ... + 2564198.

It is an arithmetic number, because the mean of its divisors is an integer number (23077638).

Almost surely, 2^87182171 is an apocalyptic number.

87182171 is a deficient number, since it is larger than the sum of its proper divisors (5128381).

87182171 is a wasteful number, since it uses less digits than its factorization.

87182171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5128380.

The product of its digits is 6272, while the sum is 35.

The square root of 87182171 is about 9337.1393370775. The cubic root of 87182171 is about 443.4138217943.

The spelling of 87182171 in words is "eighty-seven million, one hundred eighty-two thousand, one hundred seventy-one".