211828849 has 2 divisors, whose sum is σ = 211828850. Its totient is φ = 211828848.

The previous prime is 211828843. The next prime is 211828901. The reversal of 211828849 is 948828112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188238400 + 23590449 = 13720^2 + 4857^2 .

It is a cyclic number.

It is not a de Polignac number, because 211828849 - 2²⁵ = 178274417 is a prime.

It is a super-2 number, since 2×211828849² = 89742922537329602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211828843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105914424 + 105914425.

It is an arithmetic number, because the mean of its divisors is an integer number (105914425).

Almost surely, 2^211828849 is an apocalyptic number.

It is an amenable number.

211828849 is a deficient number, since it is larger than the sum of its proper divisors (1).

211828849 is an equidigital number, since it uses as much as digits as its factorization.

211828849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73728, while the sum is 43.

The square root of 211828849 is about 14554.3412423923. The cubic root of 211828849 is about 596.1126922697.

The spelling of 211828849 in words is "two hundred eleven million, eight hundred twenty-eight thousand, eight hundred forty-nine".