87201171 has 16 divisors (see below), whose sum is σ = 133355520. Its totient is φ = 56258280.

The previous prime is 87201161. The next prime is 87201187. The reversal of 87201171 is 17110278.

It is not a de Polignac number, because 87201171 - 2¹⁷ = 87070099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87201131) 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, 51255 + ... + 52928.

It is an arithmetic number, because the mean of its divisors is an integer number (8334720).

Almost surely, 2^87201171 is an apocalyptic number.

87201171 is a deficient number, since it is larger than the sum of its proper divisors (46154349).

87201171 is a wasteful number, since it uses less digits than its factorization.

87201171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104223 (or 104217 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 87201171 is about 9338.1567238936. The cubic root of 87201171 is about 443.4460311729.

The spelling of 87201171 in words is "eighty-seven million, two hundred one thousand, one hundred seventy-one".