381195855 has 16 divisors (see below), whose sum is σ = 677681760. Its totient is φ = 203304384.

The previous prime is 381195847. The next prime is 381195863. The reversal of 381195855 is 558591183.

381195855 is a `hidden beast` number, since 381 + 195 + 85 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (381195847) and next prime (381195863).

It is not a de Polignac number, because 381195855 - 2³ = 381195847 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 381195855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1411702 + ... + 1411971.

It is an arithmetic number, because the mean of its divisors is an integer number (42355110).

Almost surely, 2^381195855 is an apocalyptic number.

381195855 is a deficient number, since it is larger than the sum of its proper divisors (296485905).

381195855 is a wasteful number, since it uses less digits than its factorization.

381195855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823687 (or 2823681 counting only the distinct ones).

The product of its digits is 216000, while the sum is 45.

The square root of 381195855 is about 19524.2376291624. The cubic root of 381195855 is about 725.0746526378.

The spelling of 381195855 in words is "three hundred eighty-one million, one hundred ninety-five thousand, eight hundred fifty-five".