381225865 has 16 divisors (see below), whose sum is σ = 463003200. Its totient is φ = 301309632.

The previous prime is 381225863. The next prime is 381225869. The reversal of 381225865 is 568522183.

It is a cyclic number.

It is not a de Polignac number, because 381225865 - 2¹ = 381225863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381225863) 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, 240646 + ... + 242224.

It is an arithmetic number, because the mean of its divisors is an integer number (28937700).

Almost surely, 2^381225865 is an apocalyptic number.

It is an amenable number.

381225865 is a deficient number, since it is larger than the sum of its proper divisors (81777335).

381225865 is a wasteful number, since it uses less digits than its factorization.

381225865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136.

The product of its digits is 115200, while the sum is 40.

The square root of 381225865 is about 19525.0061459657. The cubic root of 381225865 is about 725.0936795318.

The spelling of 381225865 in words is "three hundred eighty-one million, two hundred twenty-five thousand, eight hundred sixty-five".