216251982500 has 30 divisors (see below), whose sum is σ = 472899840798. Its totient is φ = 86500792000.

The previous prime is 216251982497. The next prime is 216251982581. The reversal of 216251982500 is 5289152612.

216251982500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 143786572864 + 72465409636 = 379192^2 + 269194^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 43247897 + ... + 43252896.

Almost surely, 2^216251982500 is an apocalyptic number.

216251982500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216251982500 is an abundant number, since it is smaller than the sum of its proper divisors (256647858298).

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

216251982500 is an equidigital number, since it uses as much as digits as its factorization.

216251982500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86500817 (or 86500800 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 216251982500 in words is "two hundred sixteen billion, two hundred fifty-one million, nine hundred eighty-two thousand, five hundred".