211795481 has 2 divisors, whose sum is σ = 211795482. Its totient is φ = 211795480.

The previous prime is 211795457. The next prime is 211795531. The reversal of 211795481 is 184597112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192959881 + 18835600 = 13891^2 + 4340^2 .

It is a cyclic number.

It is not a de Polignac number, because 211795481 - 2²⁶ = 144686617 is a prime.

It is a super-2 number, since 2×211795481² = 89714651544042722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211795421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105897740 + 105897741.

It is an arithmetic number, because the mean of its divisors is an integer number (105897741).

Almost surely, 2^211795481 is an apocalyptic number.

It is an amenable number.

211795481 is a deficient number, since it is larger than the sum of its proper divisors (1).

211795481 is an equidigital number, since it uses as much as digits as its factorization.

211795481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 38.

The square root of 211795481 is about 14553.1948726044. The cubic root of 211795481 is about 596.0813900604.

The spelling of 211795481 in words is "two hundred eleven million, seven hundred ninety-five thousand, four hundred eighty-one".