381215333 has 2 divisors, whose sum is σ = 381215334. Its totient is φ = 381215332.

The previous prime is 381215323. The next prime is 381215347. The reversal of 381215333 is 333512183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234151204 + 147064129 = 15302^2 + 12127^2 .

It is an emirp because it is prime and its reverse (333512183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381215333 - 2⁸ = 381215077 is a prime.

It is a super-2 number, since 2×381215333² = 290650260228601778, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 381215296 and 381215305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381215323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190607666 + 190607667.

It is an arithmetic number, because the mean of its divisors is an integer number (190607667).

Almost surely, 2^381215333 is an apocalyptic number.

It is an amenable number.

381215333 is a deficient number, since it is larger than the sum of its proper divisors (1).

381215333 is an equidigital number, since it uses as much as digits as its factorization.

381215333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 29.

The square root of 381215333 is about 19524.7364386821. The cubic root of 381215333 is about 725.0870021631.

The spelling of 381215333 in words is "three hundred eighty-one million, two hundred fifteen thousand, three hundred thirty-three".