210005210 has 16 divisors (see below), whose sum is σ = 378844776. Its totient is φ = 83816448.

The previous prime is 210005197. The next prime is 210005273. The reversal of 210005210 is 12500012.

It can be written as a sum of positive squares in 4 ways, for example, as 182871529 + 27133681 = 13523^2 + 5209^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210005191 and 210005200.

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 7 ways as a sum of consecutive naturals, for example, 18407 + ... + 27546.

Almost surely, 2^210005210 is an apocalyptic number.

210005210 is a deficient number, since it is larger than the sum of its proper divisors (168839566).

210005210 is a wasteful number, since it uses less digits than its factorization.

210005210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46417.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 210005210 is about 14491.5565071527. The cubic root of 210005210 is about 594.3971107648.

Adding to 210005210 its reverse (12500012), we get a palindrome (222505222).

The spelling of 210005210 in words is "two hundred ten million, five thousand, two hundred ten".