211530169 has 2 divisors, whose sum is σ = 211530170. Its totient is φ = 211530168.

The previous prime is 211530157. The next prime is 211530181. The reversal of 211530169 is 961035112.

It is a balanced prime because it is at equal distance from previous prime (211530157) and next prime (211530181).

It can be written as a sum of positive squares in only one way, i.e., 207014544 + 4515625 = 14388^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 211530169 - 2²¹ = 209433017 is a prime.

It is a super-2 number, since 2×211530169² = 89490024794337122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211530139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105765084 + 105765085.

It is an arithmetic number, because the mean of its divisors is an integer number (105765085).

Almost surely, 2^211530169 is an apocalyptic number.

It is an amenable number.

211530169 is a deficient number, since it is larger than the sum of its proper divisors (1).

211530169 is an equidigital number, since it uses as much as digits as its factorization.

211530169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 211530169 is about 14544.0767668491. The cubic root of 211530169 is about 595.8323862776.

The spelling of 211530169 in words is "two hundred eleven million, five hundred thirty thousand, one hundred sixty-nine".