381000203 has 2 divisors, whose sum is σ = 381000204. Its totient is φ = 381000202.

The previous prime is 381000197. The next prime is 381000227. The reversal of 381000203 is 302000183.

It is a weak prime.

It is an emirp because it is prime and its reverse (302000183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381000203 - 2²⁴ = 364222987 is a prime.

It is a super-2 number, since 2×381000203² = 290322309372082418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381800203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190500101 + 190500102.

It is an arithmetic number, because the mean of its divisors is an integer number (190500102).

Almost surely, 2^381000203 is an apocalyptic number.

381000203 is a deficient number, since it is larger than the sum of its proper divisors (1).

381000203 is an equidigital number, since it uses as much as digits as its factorization.

381000203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 381000203 is about 19519.2264959450. The cubic root of 381000203 is about 724.9505811737.

Adding to 381000203 its reverse (302000183), we get a palindrome (683000386).

The spelling of 381000203 in words is "three hundred eighty-one million, two hundred three", and thus it is an aban number.