87835108221 has 54 divisors (see below), whose sum is σ = 148543884762. Its totient is φ = 49866606720.

The previous prime is 87835108217. The next prime is 87835108289. The reversal of 87835108221 is 12280153878.

87835108221 is a `hidden beast` number, since 8 + 78 + 351 + 0 + 8 + 221 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 22293476100 + 65541632121 = 149310^2 + 256011^2 .

It is not a de Polignac number, because 87835108221 - 2² = 87835108217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87835108021) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 83731705 + ... + 83732753.

Almost surely, 2^87835108221 is an apocalyptic number.

It is an amenable number.

87835108221 is a deficient number, since it is larger than the sum of its proper divisors (60708776541).

87835108221 is a wasteful number, since it uses less digits than its factorization.

87835108221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2299 (or 1240 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The spelling of 87835108221 in words is "eighty-seven billion, eight hundred thirty-five million, one hundred eight thousand, two hundred twenty-one".