2218152161 has 2 divisors, whose sum is σ = 2218152162. Its totient is φ = 2218152160.

The previous prime is 2218152127. The next prime is 2218152173. The reversal of 2218152161 is 1612518122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1644789136 + 573363025 = 40556^2 + 23945^2 .

It is a cyclic number.

It is not a de Polignac number, because 2218152161 - 2¹⁰ = 2218151137 is a prime.

It is not a weakly prime, because it can be changed into another prime (2218151161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109076080 + 1109076081.

It is an arithmetic number, because the mean of its divisors is an integer number (1109076081).

Almost surely, 2^2218152161 is an apocalyptic number.

It is an amenable number.

2218152161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218152161 is an equidigital number, since it uses as much as digits as its factorization.

2218152161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 29.

The square root of 2218152161 is about 47097.2627760892. The cubic root of 2218152161 is about 1304.1587059602.

The spelling of 2218152161 in words is "two billion, two hundred eighteen million, one hundred fifty-two thousand, one hundred sixty-one".