211828901 has 2 divisors, whose sum is σ = 211828902. Its totient is φ = 211828900.

The previous prime is 211828849. The next prime is 211828913. The reversal of 211828901 is 109828112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199543876 + 12285025 = 14126^2 + 3505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211828901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211828951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105914450 + 105914451.

It is an arithmetic number, because the mean of its divisors is an integer number (105914451).

Almost surely, 2^211828901 is an apocalyptic number.

It is an amenable number.

211828901 is a deficient number, since it is larger than the sum of its proper divisors (1).

211828901 is an equidigital number, since it uses as much as digits as its factorization.

211828901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 211828901 is about 14554.3430288007. The cubic root of 211828901 is about 596.1127410478.

The spelling of 211828901 in words is "two hundred eleven million, eight hundred twenty-eight thousand, nine hundred one".