2211451181 has 2 divisors, whose sum is σ = 2211451182. Its totient is φ = 2211451180.

The previous prime is 2211451159. The next prime is 2211451183. The reversal of 2211451181 is 1811541122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1339194025 + 872257156 = 36595^2 + 29534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2211451181 is a prime.

It is a super-2 number, since 2×2211451181² = 9781032651892589522, which contains 22 as substring.

Together with 2211451183, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2211451181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211451183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105725590 + 1105725591.

It is an arithmetic number, because the mean of its divisors is an integer number (1105725591).

Almost surely, 2^2211451181 is an apocalyptic number.

It is an amenable number.

2211451181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211451181 is an equidigital number, since it uses as much as digits as its factorization.

2211451181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 640, while the sum is 26.

The square root of 2211451181 is about 47026.0691638159. The cubic root of 2211451181 is about 1302.8441047652.

The spelling of 2211451181 in words is "two billion, two hundred eleven million, four hundred fifty-one thousand, one hundred eighty-one".