87311271 has 4 divisors (see below), whose sum is σ = 116415032. Its totient is φ = 58207512.

The previous prime is 87311249. The next prime is 87311281. The reversal of 87311271 is 17211378.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 87311271 - 2⁵ = 87311239 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 (87311281) 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 3 ways as a sum of consecutive naturals, for example, 14551876 + ... + 14551881.

It is an arithmetic number, because the mean of its divisors is an integer number (29103758).

Almost surely, 2^87311271 is an apocalyptic number.

87311271 is a deficient number, since it is larger than the sum of its proper divisors (29103761).

87311271 is a wasteful number, since it uses less digits than its factorization.

87311271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29103760.

The product of its digits is 2352, while the sum is 30.

The square root of 87311271 is about 9344.0500319722. The cubic root of 87311271 is about 443.6325839977.

The spelling of 87311271 in words is "eighty-seven million, three hundred eleven thousand, two hundred seventy-one".