211161617 has 2 divisors, whose sum is σ = 211161618. Its totient is φ = 211161616.

The previous prime is 211161583. The next prime is 211161653. The reversal of 211161617 is 716161112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201895681 + 9265936 = 14209^2 + 3044^2 .

It is a cyclic number.

It is not a de Polignac number, because 211161617 - 2⁸ = 211161361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211161697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105580808 + 105580809.

It is an arithmetic number, because the mean of its divisors is an integer number (105580809).

Almost surely, 2^211161617 is an apocalyptic number.

It is an amenable number.

211161617 is a deficient number, since it is larger than the sum of its proper divisors (1).

211161617 is an equidigital number, since it uses as much as digits as its factorization.

211161617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 26.

The square root of 211161617 is about 14531.4010680319. The cubic root of 211161617 is about 595.4861427184.

The spelling of 211161617 in words is "two hundred eleven million, one hundred sixty-one thousand, six hundred seventeen".