87521982228 has 18 divisors (see below), whose sum is σ = 221236121834. Its totient is φ = 29173994064.

The previous prime is 87521982209. The next prime is 87521982263. The reversal of 87521982228 is 82228912578.

87521982228 is a `hidden beast` number, since 8 + 7 + 521 + 98 + 2 + 2 + 28 = 666.

It can be written as a sum of positive squares in only one way, i.e., 73412818704 + 14109163524 = 270948^2 + 118782^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1215583051 + ... + 1215583122.

Almost surely, 2^87521982228 is an apocalyptic number.

It is an amenable number.

87521982228 is an abundant number, since it is smaller than the sum of its proper divisors (133714139606).

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

87521982228 is a wasteful number, since it uses less digits than its factorization.

87521982228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431166183 (or 2431166178 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The spelling of 87521982228 in words is "eighty-seven billion, five hundred twenty-one million, nine hundred eighty-two thousand, two hundred twenty-eight".