4022002181 has 2 divisors, whose sum is σ = 4022002182. Its totient is φ = 4022002180.

The previous prime is 4022002109. The next prime is 4022002207. The reversal of 4022002181 is 1812002204.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3615616900 + 406385281 = 60130^2 + 20159^2 .

It is a cyclic number.

It is not a de Polignac number, because 4022002181 - 2¹⁰ = 4022001157 is a prime.

It is a super-2 number, since 2×4022002181² = 32353003087937513522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4022002081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2011001090 + 2011001091.

It is an arithmetic number, because the mean of its divisors is an integer number (2011001091).

Almost surely, 2^4022002181 is an apocalyptic number.

It is an amenable number.

4022002181 is a deficient number, since it is larger than the sum of its proper divisors (1).

4022002181 is an equidigital number, since it uses as much as digits as its factorization.

4022002181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 4022002181 is about 63419.2571779266. The cubic root of 4022002181 is about 1590.3062554990.

Adding to 4022002181 its reverse (1812002204), we get a palindrome (5834004385).

The spelling of 4022002181 in words is "four billion, twenty-two million, two thousand, one hundred eighty-one".