381128351 has 2 divisors, whose sum is σ = 381128352. Its totient is φ = 381128350.

The previous prime is 381128339. The next prime is 381128381. The reversal of 381128351 is 153821183.

It is a weak prime.

It is an emirp because it is prime and its reverse (153821183) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381128351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381128381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190564175 + 190564176.

It is an arithmetic number, because the mean of its divisors is an integer number (190564176).

Almost surely, 2^381128351 is an apocalyptic number.

381128351 is a deficient number, since it is larger than the sum of its proper divisors (1).

381128351 is an equidigital number, since it uses as much as digits as its factorization.

381128351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 32.

The square root of 381128351 is about 19522.5088295536. The cubic root of 381128351 is about 725.0318502060.

The spelling of 381128351 in words is "three hundred eighty-one million, one hundred twenty-eight thousand, three hundred fifty-one".