381814555 has 8 divisors (see below), whose sum is σ = 465688944. Its totient is φ = 300444000.

The previous prime is 381814553. The next prime is 381814603. The reversal of 381814555 is 555418183.

It is a happy number.

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

It is not a de Polignac number, because 381814555 - 2¹ = 381814553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381814553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 625621 + ... + 626230.

It is an arithmetic number, because the mean of its divisors is an integer number (58211118).

Almost surely, 2^381814555 is an apocalyptic number.

381814555 is a deficient number, since it is larger than the sum of its proper divisors (83874389).

381814555 is a wasteful number, since it uses less digits than its factorization.

381814555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251917.

The product of its digits is 96000, while the sum is 40.

The square root of 381814555 is about 19540.0756139786. The cubic root of 381814555 is about 725.4667181148.

The spelling of 381814555 in words is "three hundred eighty-one million, eight hundred fourteen thousand, five hundred fifty-five".