2113544161 has 2 divisors, whose sum is σ = 2113544162. Its totient is φ = 2113544160.

The previous prime is 2113544149. The next prime is 2113544171. The reversal of 2113544161 is 1614453112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2002115025 + 111429136 = 44745^2 + 10556^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113544161 - 2¹³ = 2113535969 is a prime.

It is not a weakly prime, because it can be changed into another prime (2113544171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056772080 + 1056772081.

It is an arithmetic number, because the mean of its divisors is an integer number (1056772081).

Almost surely, 2^2113544161 is an apocalyptic number.

It is an amenable number.

2113544161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113544161 is an equidigital number, since it uses as much as digits as its factorization.

2113544161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 28.

The square root of 2113544161 is about 45973.2983480629. The cubic root of 2113544161 is about 1283.3263420245.

Adding to 2113544161 its reverse (1614453112), we get a palindrome (3727997273).

The spelling of 2113544161 in words is "two billion, one hundred thirteen million, five hundred forty-four thousand, one hundred sixty-one".