211350649 has 2 divisors, whose sum is σ = 211350650. Its totient is φ = 211350648.

The previous prime is 211350641. The next prime is 211350679. The reversal of 211350649 is 946053112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165585424 + 45765225 = 12868^2 + 6765^2 .

It is a cyclic number.

It is not a de Polignac number, because 211350649 - 2³ = 211350641 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211350649.

It is not a weakly prime, because it can be changed into another prime (211350641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105675324 + 105675325.

It is an arithmetic number, because the mean of its divisors is an integer number (105675325).

Almost surely, 2^211350649 is an apocalyptic number.

It is an amenable number.

211350649 is a deficient number, since it is larger than the sum of its proper divisors (1).

211350649 is an equidigital number, since it uses as much as digits as its factorization.

211350649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 211350649 is about 14537.9038722919. The cubic root of 211350649 is about 595.6637828993.

The spelling of 211350649 in words is "two hundred eleven million, three hundred fifty thousand, six hundred forty-nine".