210000225 has 12 divisors (see below), whose sum is σ = 347200496. Its totient is φ = 112000080.

The previous prime is 210000199. The next prime is 210000239. The reversal of 210000225 is 522000012.

It is not a de Polignac number, because 210000225 - 2¹⁶ = 209934689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210000225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1399927 + ... + 1400076.

Almost surely, 2^210000225 is an apocalyptic number.

210000225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

210000225 is a deficient number, since it is larger than the sum of its proper divisors (137200271).

210000225 is a wasteful number, since it uses less digits than its factorization.

210000225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800016 (or 2800011 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 210000225 is about 14491.3845094249. The cubic root of 210000225 is about 594.3924075592.

Adding to 210000225 its reverse (522000012), we get a palindrome (732000237).

The spelling of 210000225 in words is "two hundred ten million, two hundred twenty-five", and thus it is an aban number.