381220249 has 8 divisors (see below), whose sum is σ = 383366592. Its totient is φ = 379080240.

The previous prime is 381220247. The next prime is 381220253. The reversal of 381220249 is 942022183.

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 381220249 - 2¹ = 381220247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381220249.

It is not an unprimeable number, because it can be changed into a prime (381220247) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 163804 + ... + 166114.

It is an arithmetic number, because the mean of its divisors is an integer number (47920824).

Almost surely, 2^381220249 is an apocalyptic number.

It is an amenable number.

381220249 is a deficient number, since it is larger than the sum of its proper divisors (2146343).

381220249 is a wasteful number, since it uses less digits than its factorization.

381220249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3167.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 381220249 is about 19524.8623298604. The cubic root of 381220249 is about 725.0901189601.

The spelling of 381220249 in words is "three hundred eighty-one million, two hundred twenty thousand, two hundred forty-nine".