211422245 has 4 divisors (see below), whose sum is σ = 253706700. Its totient is φ = 169137792.

The previous prime is 211422223. The next prime is 211422257. The reversal of 211422245 is 542224112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 132319009 + 79103236 = 11503^2 + 8894^2 .

It is a cyclic number.

It is not a de Polignac number, because 211422245 - 2⁸ = 211421989 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 211422245.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 21142220 + ... + 21142229.

It is an arithmetic number, because the mean of its divisors is an integer number (63426675).

Almost surely, 2^211422245 is an apocalyptic number.

It is an amenable number.

211422245 is a deficient number, since it is larger than the sum of its proper divisors (42284455).

211422245 is an equidigital number, since it uses as much as digits as its factorization.

211422245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42284454.

The product of its digits is 1280, while the sum is 23.

The square root of 211422245 is about 14540.3660545393. The cubic root of 211422245 is about 595.7310365835.

Adding to 211422245 its reverse (542224112), we get a palindrome (753646357).

The spelling of 211422245 in words is "two hundred eleven million, four hundred twenty-two thousand, two hundred forty-five".