211005125 has 8 divisors (see below), whose sum is σ = 263334552. Its totient is φ = 168804000.

The previous prime is 211005061. The next prime is 211005209. The reversal of 211005125 is 521500112.

It can be written as a sum of positive squares in 4 ways, for example, as 28376929 + 182628196 = 5327^2 + 13514^2 .

It is not a de Polignac number, because 211005125 - 2⁶ = 211005061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 843896 + ... + 844145.

It is an arithmetic number, because the mean of its divisors is an integer number (32916819).

Almost surely, 2^211005125 is an apocalyptic number.

211005125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211005125 is a deficient number, since it is larger than the sum of its proper divisors (52329427).

211005125 is an equidigital number, since it uses as much as digits as its factorization.

211005125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688056 (or 1688046 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 211005125 is about 14526.0154550379. The cubic root of 211005125 is about 595.3390013186.

Adding to 211005125 its reverse (521500112), we get a palindrome (732505237).

The spelling of 211005125 in words is "two hundred eleven million, five thousand, one hundred twenty-five".