211328857 has 2 divisors, whose sum is σ = 211328858. Its totient is φ = 211328856.

The previous prime is 211328753. The next prime is 211328881. The reversal of 211328857 is 758823112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186568281 + 24760576 = 13659^2 + 4976^2 .

It is a cyclic number.

It is not a de Polignac number, because 211328857 - 2⁷ = 211328729 is a prime.

It is not a weakly prime, because it can be changed into another prime (211328657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105664428 + 105664429.

It is an arithmetic number, because the mean of its divisors is an integer number (105664429).

Almost surely, 2^211328857 is an apocalyptic number.

It is an amenable number.

211328857 is a deficient number, since it is larger than the sum of its proper divisors (1).

211328857 is an equidigital number, since it uses as much as digits as its factorization.

211328857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 211328857 is about 14537.1543639049. The cubic root of 211328857 is about 595.6433095747.

The spelling of 211328857 in words is "two hundred eleven million, three hundred twenty-eight thousand, eight hundred fifty-seven".