381818183 has 2 divisors, whose sum is σ = 381818184. Its totient is φ = 381818182.

The previous prime is 381818161. The next prime is 381818197.

381818183 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 381818183 - 2⁶ = 381818119 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 381818183.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381818123) 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, 190909091 + 190909092.

It is an arithmetic number, because the mean of its divisors is an integer number (190909092).

Almost surely, 2^381818183 is an apocalyptic number.

381818183 is a deficient number, since it is larger than the sum of its proper divisors (1).

381818183 is an equidigital number, since it uses as much as digits as its factorization.

381818183 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 41.

The square root of 381818183 is about 19540.1684486086. The cubic root of 381818183 is about 725.4690159012.

It can be divided in two parts, 38181 and 8183, that added together give a palindrome (46364).

The spelling of 381818183 in words is "three hundred eighty-one million, eight hundred eighteen thousand, one hundred eighty-three".