87216500 has 48 divisors (see below), whose sum is σ = 217701120. Its totient is φ = 29901600.

The previous prime is 87216491. The next prime is 87216541. The reversal of 87216500 is 561278.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 8960 + ... + 15959.

It is an arithmetic number, because the mean of its divisors is an integer number (4535440).

Almost surely, 2^87216500 is an apocalyptic number.

It is an amenable number.

87216500 is an abundant number, since it is smaller than the sum of its proper divisors (130484620).

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

87216500 is a wasteful number, since it uses less digits than its factorization.

87216500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24945 (or 24933 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 87216500 is about 9338.9774600863. The cubic root of 87216500 is about 443.4720139506.

Adding to 87216500 its reverse (561278), we get a palindrome (87777778).

The spelling of 87216500 in words is "eighty-seven million, two hundred sixteen thousand, five hundred".