381820331 has 8 divisors (see below), whose sum is σ = 392197344. Its totient is φ = 371494080.

The previous prime is 381820303. The next prime is 381820343. The reversal of 381820331 is 133028183.

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 381820331 - 2⁶ = 381820267 is a prime.

It is a super-2 number, since 2×381820331² = 291573530329899122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 381820294 and 381820303.

It is not an unprimeable number, because it can be changed into a prime (381826331) 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, 2810 + ... + 27776.

It is an arithmetic number, because the mean of its divisors is an integer number (49024668).

Almost surely, 2^381820331 is an apocalyptic number.

381820331 is a deficient number, since it is larger than the sum of its proper divisors (10377013).

381820331 is a wasteful number, since it uses less digits than its factorization.

381820331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25381.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 381820331 is about 19540.2234122335. The cubic root of 381820331 is about 725.4703763258.

The spelling of 381820331 in words is "three hundred eighty-one million, eight hundred twenty thousand, three hundred thirty-one".