8210381 has 12 divisors (see below), whose sum is σ = 8749440. Its totient is φ = 7694280.

The previous prime is 8210353. The next prime is 8210387. The reversal of 8210381 is 1830128.

It is not a de Polignac number, because 8210381 - 2⁶ = 8210317 is a prime.

It is a super-2 number, since 2×8210381² = 134820712330322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8210387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122510 + ... + 122576.

It is an arithmetic number, because the mean of its divisors is an integer number (729120).

Almost surely, 2^8210381 is an apocalyptic number.

It is an amenable number.

8210381 is a deficient number, since it is larger than the sum of its proper divisors (539059).

8210381 is an equidigital number, since it uses as much as digits as its factorization.

8210381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 8210381 is about 2865.3762405660. The cubic root of 8210381 is about 201.7380275501.

The spelling of 8210381 in words is "eight million, two hundred ten thousand, three hundred eighty-one".