2043222161 has 2 divisors, whose sum is σ = 2043222162. Its totient is φ = 2043222160.

The previous prime is 2043222157. The next prime is 2043222169. The reversal of 2043222161 is 1612223402.

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., 2032206400 + 11015761 = 45080^2 + 3319^2 .

It is a cyclic number.

It is not a de Polignac number, because 2043222161 - 2² = 2043222157 is a prime.

It is not a weakly prime, because it can be changed into another prime (2043222169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021611080 + 1021611081.

It is an arithmetic number, because the mean of its divisors is an integer number (1021611081).

Almost surely, 2^2043222161 is an apocalyptic number.

It is an amenable number.

2043222161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2043222161 is an equidigital number, since it uses as much as digits as its factorization.

2043222161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 2043222161 is about 45202.0150103953. The cubic root of 2043222161 is about 1268.9325274827.

Adding to 2043222161 its reverse (1612223402), we get a palindrome (3655445563).

The spelling of 2043222161 in words is "two billion, forty-three million, two hundred twenty-two thousand, one hundred sixty-one".