381242255 has 16 divisors (see below), whose sum is σ = 487127520. Its totient is φ = 285437952.

The previous prime is 381242249. The next prime is 381242263. The reversal of 381242255 is 552242183.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381242255 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2687 + ... + 27743.

It is an arithmetic number, because the mean of its divisors is an integer number (30445470).

Almost surely, 2^381242255 is an apocalyptic number.

381242255 is a deficient number, since it is larger than the sum of its proper divisors (105885265).

381242255 is a wasteful number, since it uses less digits than its factorization.

381242255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25258.

The product of its digits is 19200, while the sum is 32.

The square root of 381242255 is about 19525.4258596324. The cubic root of 381242255 is about 725.1040706727.

The spelling of 381242255 in words is "three hundred eighty-one million, two hundred forty-two thousand, two hundred fifty-five".