381321267 has 16 divisors (see below), whose sum is σ = 516247680. Its totient is φ = 250316352.

The previous prime is 381321253. The next prime is 381321289. The reversal of 381321267 is 762123183.

It is not a de Polignac number, because 381321267 - 2⁴ = 381321251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381321217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187108 + ... + 189134.

It is an arithmetic number, because the mean of its divisors is an integer number (32265480).

Almost surely, 2^381321267 is an apocalyptic number.

381321267 is a deficient number, since it is larger than the sum of its proper divisors (134926413).

381321267 is a wasteful number, since it uses less digits than its factorization.

381321267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962.

The product of its digits is 12096, while the sum is 33.

The square root of 381321267 is about 19527.4490653541. The cubic root of 381321267 is about 725.1541595289.

The spelling of 381321267 in words is "three hundred eighty-one million, three hundred twenty-one thousand, two hundred sixty-seven".