210028225 has 12 divisors (see below), whose sum is σ = 284111280. Its totient is φ = 152747600.

The previous prime is 210028207. The next prime is 210028277. The reversal of 210028225 is 522820012.

It is not a de Polignac number, because 210028225 - 2¹⁷ = 209897153 is a prime.

It is a super-2 number, since 2×210028225² = 88223710593301250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210028196 and 210028205.

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, 381595 + ... + 382144.

It is an arithmetic number, because the mean of its divisors is an integer number (23675940).

Almost surely, 2^210028225 is an apocalyptic number.

210028225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

210028225 is a deficient number, since it is larger than the sum of its proper divisors (74083055).

210028225 is a wasteful number, since it uses less digits than its factorization.

210028225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763760 (or 763755 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 210028225 is about 14492.3505684896. The cubic root of 210028225 is about 594.4188237972.

Adding to 210028225 its reverse (522820012), we get a palindrome (732848237).

The spelling of 210028225 in words is "two hundred ten million, twenty-eight thousand, two hundred twenty-five".