381545163 has 6 divisors (see below), whose sum is σ = 551120804. Its totient is φ = 254363436.

The previous prime is 381545159. The next prime is 381545173. The reversal of 381545163 is 361545183.

It is not a de Polignac number, because 381545163 - 2² = 381545159 is a prime.

It is a super-2 number, since 2×381545163² = 291153422817393138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381545113) 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 in 5 ways as a sum of consecutive naturals, for example, 21196945 + ... + 21196962.

Almost surely, 2^381545163 is an apocalyptic number.

381545163 is a deficient number, since it is larger than the sum of its proper divisors (169575641).

381545163 is a wasteful number, since it uses less digits than its factorization.

381545163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42393913 (or 42393910 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 381545163 is about 19533.1810773361. The cubic root of 381545163 is about 725.2960585550.

The spelling of 381545163 in words is "three hundred eighty-one million, five hundred forty-five thousand, one hundred sixty-three".