87565275 has 72 divisors (see below), whose sum is σ = 182800800. Its totient is φ = 39237120.

The previous prime is 87565271. The next prime is 87565279. The reversal of 87565275 is 57256578.

87565275 is a `hidden beast` number, since 87 + 565 + 2 + 7 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (87565271) and next prime (87565279).

It is not a de Polignac number, because 87565275 - 2² = 87565271 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 87565275.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87565271) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 82951 + ... + 83999.

It is an arithmetic number, because the mean of its divisors is an integer number (2538900).

Almost surely, 2^87565275 is an apocalyptic number.

87565275 is an abundant number, since it is smaller than the sum of its proper divisors (95235525).

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

87565275 is a wasteful number, since it uses less digits than its factorization.

87565275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125 (or 1117 counting only the distinct ones).

The product of its digits is 588000, while the sum is 45.

The square root of 87565275 is about 9357.6319119743. The cubic root of 87565275 is about 444.0623694951.

The spelling of 87565275 in words is "eighty-seven million, five hundred sixty-five thousand, two hundred seventy-five".