381044431 has 2 divisors, whose sum is σ = 381044432. Its totient is φ = 381044430.

The previous prime is 381044407. The next prime is 381044471. The reversal of 381044431 is 134440183.

It is a weak prime.

It is an emirp because it is prime and its reverse (134440183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381044431 - 2⁷ = 381044303 is a prime.

It is a super-2 number, since 2×381044431² = 290389716792227522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 381044431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381044471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190522215 + 190522216.

It is an arithmetic number, because the mean of its divisors is an integer number (190522216).

Almost surely, 2^381044431 is an apocalyptic number.

381044431 is a deficient number, since it is larger than the sum of its proper divisors (1).

381044431 is an equidigital number, since it uses as much as digits as its factorization.

381044431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 381044431 is about 19520.3593973062. The cubic root of 381044431 is about 724.9786317919.

The spelling of 381044431 in words is "three hundred eighty-one million, forty-four thousand, four hundred thirty-one".