8219381 has 8 divisors (see below), whose sum is σ = 9161280. Its totient is φ = 7328448.

The previous prime is 8219357. The next prime is 8219401. The reversal of 8219381 is 1839128.

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 8219381 - 2⁶ = 8219317 is a prime.

It is a super-2 number, since 2×8219381² = 135116448046322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8219881) 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, 12401 + ... + 13046.

It is an arithmetic number, because the mean of its divisors is an integer number (1145160).

Almost surely, 2^8219381 is an apocalyptic number.

It is an amenable number.

8219381 is a deficient number, since it is larger than the sum of its proper divisors (941899).

8219381 is a wasteful number, since it uses less digits than its factorization.

8219381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25483.

The product of its digits is 3456, while the sum is 32.

The square root of 8219381 is about 2866.9462848125. The cubic root of 8219381 is about 201.8117139086.

The spelling of 8219381 in words is "eight million, two hundred nineteen thousand, three hundred eighty-one".