211152181 has 2 divisors, whose sum is σ = 211152182. Its totient is φ = 211152180.

The previous prime is 211152157. The next prime is 211152203. The reversal of 211152181 is 181251112.

It is an a-pointer prime, because the next prime (211152203) can be obtained adding 211152181 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205348900 + 5803281 = 14330^2 + 2409^2 .

It is a cyclic number.

It is not a de Polignac number, because 211152181 - 2⁹ = 211151669 is a prime.

It is a super-2 number, since 2×211152181² = 89170487082113522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211156181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105576090 + 105576091.

It is an arithmetic number, because the mean of its divisors is an integer number (105576091).

Almost surely, 2^211152181 is an apocalyptic number.

It is an amenable number.

211152181 is a deficient number, since it is larger than the sum of its proper divisors (1).

211152181 is an equidigital number, since it uses as much as digits as its factorization.

211152181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 160, while the sum is 22.

The square root of 211152181 is about 14531.0763882102. The cubic root of 211152181 is about 595.4772725916.

The spelling of 211152181 in words is "two hundred eleven million, one hundred fifty-two thousand, one hundred eighty-one".