210552500 has 30 divisors (see below), whose sum is σ = 460441674. Its totient is φ = 84220000.

The previous prime is 210552481. The next prime is 210552521. The reversal of 210552500 is 5255012.

210552500 is digitally balanced in base 3, 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 21049744 + 189502756 = 4588^2 + 13766^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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 9 ways as a sum of consecutive naturals, for example, 39611 + ... + 44610.

Almost surely, 2^210552500 is an apocalyptic number.

210552500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210552500 is an abundant number, since it is smaller than the sum of its proper divisors (249889174).

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

210552500 is an equidigital number, since it uses as much as digits as its factorization.

210552500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84245 (or 84228 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 210552500 is about 14510.4272852318. The cubic root of 210552500 is about 594.9130113161.

The spelling of 210552500 in words is "two hundred ten million, five hundred fifty-two thousand, five hundred".