211331333225 has 6 divisors (see below), whose sum is σ = 262050853230. Its totient is φ = 169065066560.

The previous prime is 211331333189. The next prime is 211331333263. The reversal of 211331333225 is 522333133112.

It can be written as a sum of positive squares in 3 ways, for example, as 30218954896 + 181112378329 = 173836^2 + 425573^2 .

It is not a de Polignac number, because 211331333225 - 2⁸ = 211331332969 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4226626640 + ... + 4226626689.

It is an arithmetic number, because the mean of its divisors is an integer number (43675142205).

Almost surely, 2^211331333225 is an apocalyptic number.

211331333225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211331333225 is a deficient number, since it is larger than the sum of its proper divisors (50719520005).

211331333225 is an equidigital number, since it uses as much as digits as its factorization.

211331333225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8453253339 (or 8453253334 counting only the distinct ones).

The product of its digits is 9720, while the sum is 29.

Adding to 211331333225 its reverse (522333133112), we get a palindrome (733664466337).

The spelling of 211331333225 in words is "two hundred eleven billion, three hundred thirty-one million, three hundred thirty-three thousand, two hundred twenty-five".