381884231 has 2 divisors, whose sum is σ = 381884232. Its totient is φ = 381884230.

The previous prime is 381884227. The next prime is 381884233. The reversal of 381884231 is 132488183.

It is a strong prime.

It is an emirp because it is prime and its reverse (132488183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381884231 - 2² = 381884227 is a prime.

It is a super-2 number, since 2×381884231² = 291671131772922722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 381884233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381884233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190942115 + 190942116.

It is an arithmetic number, because the mean of its divisors is an integer number (190942116).

Almost surely, 2^381884231 is an apocalyptic number.

381884231 is a deficient number, since it is larger than the sum of its proper divisors (1).

381884231 is an equidigital number, since it uses as much as digits as its factorization.

381884231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 38.

The square root of 381884231 is about 19541.8584326056. The cubic root of 381884231 is about 725.5108447237.

The spelling of 381884231 in words is "three hundred eighty-one million, eight hundred eighty-four thousand, two hundred thirty-one".