381565941 has 16 divisors (see below), whose sum is σ = 523298304. Its totient is φ = 247126464.

The previous prime is 381565907. The next prime is 381565991. The reversal of 381565941 is 149565183.

It is not a de Polignac number, because 381565941 - 2¹³ = 381557749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 381565893 and 381565902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381565991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83580 + ... + 88026.

It is an arithmetic number, because the mean of its divisors is an integer number (32706144).

Almost surely, 2^381565941 is an apocalyptic number.

It is an amenable number.

381565941 is a deficient number, since it is larger than the sum of its proper divisors (141732363).

381565941 is a wasteful number, since it uses less digits than its factorization.

381565941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5260.

The product of its digits is 129600, while the sum is 42.

The square root of 381565941 is about 19533.7129343092. The cubic root of 381565941 is about 725.3092242554.

The spelling of 381565941 in words is "three hundred eighty-one million, five hundred sixty-five thousand, nine hundred forty-one".