4181213161 has 2 divisors, whose sum is σ = 4181213162. Its totient is φ = 4181213160.

The previous prime is 4181213159. The next prime is 4181213221. The reversal of 4181213161 is 1613121814.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3827773161 + 353440000 = 61869^2 + 18800^2 .

It is a cyclic number.

It is not a de Polignac number, because 4181213161 - 2¹ = 4181213159 is a prime.

It is a super-2 number, since 2×4181213161² = 34965086995439223842, which contains 22 as substring.

Together with 4181213159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4181213111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2090606580 + 2090606581.

It is an arithmetic number, because the mean of its divisors is an integer number (2090606581).

Almost surely, 2^4181213161 is an apocalyptic number.

It is an amenable number.

4181213161 is a deficient number, since it is larger than the sum of its proper divisors (1).

4181213161 is an equidigital number, since it uses as much as digits as its factorization.

4181213161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 28.

The square root of 4181213161 is about 64662.3009256553. The cubic root of 4181213161 is about 1611.0193974954.

Adding to 4181213161 its reverse (1613121814), we get a palindrome (5794334975).

The spelling of 4181213161 in words is "four billion, one hundred eighty-one million, two hundred thirteen thousand, one hundred sixty-one".