87571215 has 24 divisors (see below), whose sum is σ = 152071920. Its totient is φ = 46617984.

The previous prime is 87571207. The next prime is 87571217. The reversal of 87571215 is 51217578.

87571215 is a `hidden beast` number, since 87 + 571 + 2 + 1 + 5 = 666.

It is not a de Polignac number, because 87571215 - 2³ = 87571207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87571215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87571217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28179 + ... + 31131.

It is an arithmetic number, because the mean of its divisors is an integer number (6336330).

Almost surely, 2^87571215 is an apocalyptic number.

87571215 is a deficient number, since it is larger than the sum of its proper divisors (64500705).

87571215 is a wasteful number, since it uses less digits than its factorization.

87571215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3623 (or 3620 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 87571215 is about 9357.9492945837. The cubic root of 87571215 is about 444.0724102745.

The spelling of 87571215 in words is "eighty-seven million, five hundred seventy-one thousand, two hundred fifteen".