87221700 has 108 divisors (see below), whose sum is σ = 275329600. Its totient is φ = 23094720.

The previous prime is 87221699. The next prime is 87221737. The reversal of 87221700 is 712278.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 178857 + ... + 179343.

Almost surely, 2^87221700 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87221700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137664800).

87221700 is an abundant number, since it is smaller than the sum of its proper divisors (188107900).

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

87221700 is a wasteful number, since it uses less digits than its factorization.

87221700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706 (or 696 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 87221700 is about 9339.2558590072. The cubic root of 87221700 is about 443.4808273007.

Adding to 87221700 its reverse (712278), we get a palindrome (87933978).

The spelling of 87221700 in words is "eighty-seven million, two hundred twenty-one thousand, seven hundred".