381366183 has 16 divisors (see below), whose sum is σ = 567616896. Its totient is φ = 225755040.

The previous prime is 381366169. The next prime is 381366191. The reversal of 381366183 is 381663183.

It is not a de Polignac number, because 381366183 - 2⁹ = 381365671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381366103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132960 + ... + 135797.

It is an arithmetic number, because the mean of its divisors is an integer number (35476056).

Almost surely, 2^381366183 is an apocalyptic number.

381366183 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

381366183 is a deficient number, since it is larger than the sum of its proper divisors (186250713).

381366183 is a wasteful number, since it uses less digits than its factorization.

381366183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268814.

The product of its digits is 62208, while the sum is 39.

The square root of 381366183 is about 19528.5991049025. The cubic root of 381366183 is about 725.1826304870.

It can be divided in two parts, 3813 and 66183, that added together give a palindrome (69996).

The spelling of 381366183 in words is "three hundred eighty-one million, three hundred sixty-six thousand, one hundred eighty-three".