211430225 has 12 divisors (see below), whose sum is σ = 266088624. Its totient is φ = 166618320.

The previous prime is 211430203. The next prime is 211430227. The reversal of 211430225 is 522034112.

It is not a de Polignac number, because 211430225 - 2⁶ = 211430161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211430197 and 211430206.

It is not an unprimeable number, because it can be changed into a prime (211430227) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 61439 + ... + 64788.

It is an arithmetic number, because the mean of its divisors is an integer number (22174052).

Almost surely, 2^211430225 is an apocalyptic number.

211430225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211430225 is a deficient number, since it is larger than the sum of its proper divisors (54658399).

211430225 is a wasteful number, since it uses less digits than its factorization.

211430225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126304 (or 126299 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 211430225 is about 14540.6404604474. The cubic root of 211430225 is about 595.7385316540.

Adding to 211430225 its reverse (522034112), we get a palindrome (733464337).

The spelling of 211430225 in words is "two hundred eleven million, four hundred thirty thousand, two hundred twenty-five".