381027331 has 2 divisors, whose sum is σ = 381027332. Its totient is φ = 381027330.

The previous prime is 381027329. The next prime is 381027337. The reversal of 381027331 is 133720183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381027331 - 2¹ = 381027329 is a prime.

It is a super-2 number, since 2×381027331² = 290363653937967122, which contains 22 as substring.

Together with 381027329, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 381027331.

It is not a weakly prime, because it can be changed into another prime (381027337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190513665 + 190513666.

It is an arithmetic number, because the mean of its divisors is an integer number (190513666).

Almost surely, 2^381027331 is an apocalyptic number.

381027331 is a deficient number, since it is larger than the sum of its proper divisors (1).

381027331 is an equidigital number, since it uses as much as digits as its factorization.

381027331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 381027331 is about 19519.9213881614. The cubic root of 381027331 is about 724.9677867574.

It can be divided in two parts, 3810273 and 31, that added together give a square (3810304 = 1952²).

The spelling of 381027331 in words is "three hundred eighty-one million, twenty-seven thousand, three hundred thirty-one".