381003311 has 4 divisors (see below), whose sum is σ = 410311272. Its totient is φ = 351695352.

The previous prime is 381003289. The next prime is 381003313. The reversal of 381003311 is 113300183.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 381003311 - 2¹⁸ = 380741167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381003313) 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 in 3 ways as a sum of consecutive naturals, for example, 14653961 + ... + 14653986.

It is an arithmetic number, because the mean of its divisors is an integer number (102577818).

Almost surely, 2^381003311 is an apocalyptic number.

381003311 is a deficient number, since it is larger than the sum of its proper divisors (29307961).

381003311 is a wasteful number, since it uses less digits than its factorization.

381003311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29307960.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 381003311 is about 19519.3061095931. The cubic root of 381003311 is about 724.9525524240.

Adding to 381003311 its reverse (113300183), we get a palindrome (494303494).

The spelling of 381003311 in words is "three hundred eighty-one million, three thousand, three hundred eleven".