381956219 has 2 divisors, whose sum is σ = 381956220. Its totient is φ = 381956218.

The previous prime is 381956207. The next prime is 381956233. The reversal of 381956219 is 912659183.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (912659183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381956219 - 2⁴ = 381956203 is a prime.

It is a super-2 number, since 2×381956219² = 291781106465551922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 381956219.

It is not a weakly prime, because it can be changed into another prime (381926219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190978109 + 190978110.

It is an arithmetic number, because the mean of its divisors is an integer number (190978110).

Almost surely, 2^381956219 is an apocalyptic number.

381956219 is a deficient number, since it is larger than the sum of its proper divisors (1).

381956219 is an equidigital number, since it uses as much as digits as its factorization.

381956219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 44.

The square root of 381956219 is about 19543.7002381842. The cubic root of 381956219 is about 725.5564299115.

The spelling of 381956219 in words is "three hundred eighty-one million, nine hundred fifty-six thousand, two hundred nineteen".