381671019 has 12 divisors (see below), whose sum is σ = 551472792. Its totient is φ = 254368800.

The previous prime is 381671011. The next prime is 381671023. The reversal of 381671019 is 910176183.

It is not a de Polignac number, because 381671019 - 2³ = 381671011 is a prime.

It is a super-2 number, since 2×381671019² = 291345533488996722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (381671011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49324 + ... + 56534.

It is an arithmetic number, because the mean of its divisors is an integer number (45956066).

Almost surely, 2^381671019 is an apocalyptic number.

381671019 is a deficient number, since it is larger than the sum of its proper divisors (169801773).

381671019 is a wasteful number, since it uses less digits than its factorization.

381671019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13098 (or 13095 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 381671019 is about 19536.4024067892. The cubic root of 381671019 is about 725.3757981984.

The spelling of 381671019 in words is "three hundred eighty-one million, six hundred seventy-one thousand, nineteen".