4194312181 has 2 divisors, whose sum is σ = 4194312182. Its totient is φ = 4194312180.

The previous prime is 4194312179. The next prime is 4194312197. The reversal of 4194312181 is 1812134914.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3207409956 + 986902225 = 56634^2 + 31415^2 .

It is a cyclic number.

It is not a de Polignac number, because 4194312181 - 2¹ = 4194312179 is a prime.

It is a super-2 number, since 2×4194312181² = 35184509343369953522, which contains 22 as substring.

Together with 4194312179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4194310181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2097156090 + 2097156091.

It is an arithmetic number, because the mean of its divisors is an integer number (2097156091).

Almost surely, 2^4194312181 is an apocalyptic number.

It is an amenable number.

4194312181 is a deficient number, since it is larger than the sum of its proper divisors (1).

4194312181 is an equidigital number, since it uses as much as digits as its factorization.

4194312181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 34.

The square root of 4194312181 is about 64763.5096408464. The cubic root of 4194312181 is about 1612.6999923891.

The spelling of 4194312181 in words is "four billion, one hundred ninety-four million, three hundred twelve thousand, one hundred eighty-one".