211054409 has 2 divisors, whose sum is σ = 211054410. Its totient is φ = 211054408.

The previous prime is 211054399. The next prime is 211054423. The reversal of 211054409 is 904450112.

211054409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156250000 + 54804409 = 12500^2 + 7403^2 .

It is a cyclic number.

It is not a de Polignac number, because 211054409 - 2⁸ = 211054153 is a prime.

It is not a weakly prime, because it can be changed into another prime (211054469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105527204 + 105527205.

It is an arithmetic number, because the mean of its divisors is an integer number (105527205).

Almost surely, 2^211054409 is an apocalyptic number.

It is an amenable number.

211054409 is a deficient number, since it is larger than the sum of its proper divisors (1).

211054409 is an equidigital number, since it uses as much as digits as its factorization.

211054409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 211054409 is about 14527.7117606318. The cubic root of 211054409 is about 595.3853483813.

The spelling of 211054409 in words is "two hundred eleven million, fifty-four thousand, four hundred nine".