381331003 has 4 divisors (see below), whose sum is σ = 382632768. Its totient is φ = 380029240.

The previous prime is 381330977. The next prime is 381331019. The reversal of 381331003 is 300133183.

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 381331003 - 2⁹ = 381330491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381331033) 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, 650443 + ... + 651028.

It is an arithmetic number, because the mean of its divisors is an integer number (95658192).

Almost surely, 2^381331003 is an apocalyptic number.

381331003 is a deficient number, since it is larger than the sum of its proper divisors (1301765).

381331003 is a wasteful number, since it uses less digits than its factorization.

381331003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301764.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 381331003 is about 19527.6983538767. The cubic root of 381331003 is about 725.1603310885.

Adding to 381331003 its reverse (300133183), we get a palindrome (681464186).

The spelling of 381331003 in words is "three hundred eighty-one million, three hundred thirty-one thousand, three".