2868181 has 2 divisors, whose sum is σ = 2868182. Its totient is φ = 2868180.

The previous prime is 2868163. The next prime is 2868191. The reversal of 2868181 is 1818682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2160900 + 707281 = 1470^2 + 841^2 .

It is a cyclic number.

It is not a de Polignac number, because 2868181 - 2⁵ = 2868149 is a prime.

It is a super-2 number, since 2×2868181² = 16452924497522, which contains 22 as substring.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2868161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1434090 + 1434091.

It is an arithmetic number, because the mean of its divisors is an integer number (1434091).

2^2868181 is an apocalyptic number.

It is an amenable number.

2868181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2868181 is an equidigital number, since it uses as much as digits as its factorization.

2868181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 34.

The square root of 2868181 is about 1693.5704886423. The cubic root of 2868181 is about 142.0808406974.

The spelling of 2868181 in words is "two million, eight hundred sixty-eight thousand, one hundred eighty-one".