211249249 has 2 divisors, whose sum is σ = 211249250. Its totient is φ = 211249248.

The previous prime is 211249231. The next prime is 211249279. The reversal of 211249249 is 942942112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211179024 + 70225 = 14532^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 211249249 - 2⁷ = 211249121 is a prime.

It is not a weakly prime, because it can be changed into another prime (211249229) 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 as a sum of consecutive naturals, namely, 105624624 + 105624625.

It is an arithmetic number, because the mean of its divisors is an integer number (105624625).

Almost surely, 2^211249249 is an apocalyptic number.

It is an amenable number.

211249249 is a deficient number, since it is larger than the sum of its proper divisors (1).

211249249 is an equidigital number, since it uses as much as digits as its factorization.

211249249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 211249249 is about 14534.4160185403. The cubic root of 211249249 is about 595.5685068420.

The spelling of 211249249 in words is "two hundred eleven million, two hundred forty-nine thousand, two hundred forty-nine".