381115217 has 8 divisors (see below), whose sum is σ = 435702912. Its totient is φ = 326563200.

The previous prime is 381115211. The next prime is 381115219. The reversal of 381115217 is 712511183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381115217 - 2⁶ = 381115153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381115217.

It is not an unprimeable number, because it can be changed into a prime (381115211) 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 7 ways as a sum of consecutive naturals, for example, 20417 + ... + 34337.

It is an arithmetic number, because the mean of its divisors is an integer number (54462864).

Almost surely, 2^381115217 is an apocalyptic number.

It is an amenable number.

381115217 is a deficient number, since it is larger than the sum of its proper divisors (54587695).

381115217 is a wasteful number, since it uses less digits than its factorization.

381115217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17839.

The product of its digits is 1680, while the sum is 29.

The square root of 381115217 is about 19522.1724457090. The cubic root of 381115217 is about 725.0235217101.

The spelling of 381115217 in words is "three hundred eighty-one million, one hundred fifteen thousand, two hundred seventeen".