381444155 has 8 divisors (see below), whose sum is σ = 459733200. Its totient is φ = 303821856.

The previous prime is 381444149. The next prime is 381444157. The reversal of 381444155 is 551444183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381444155 - 2²⁰ = 380395579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381444157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165425 + ... + 167714.

It is an arithmetic number, because the mean of its divisors is an integer number (57466650).

Almost surely, 2^381444155 is an apocalyptic number.

381444155 is a deficient number, since it is larger than the sum of its proper divisors (78289045).

381444155 is a wasteful number, since it uses less digits than its factorization.

381444155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333373.

The product of its digits is 38400, while the sum is 35.

The square root of 381444155 is about 19530.5953570289. The cubic root of 381444155 is about 725.2320493828.

The spelling of 381444155 in words is "three hundred eighty-one million, four hundred forty-four thousand, one hundred fifty-five".