8163381 has 4 divisors (see below), whose sum is σ = 10884512. Its totient is φ = 5442252.

The previous prime is 8163359. The next prime is 8163401. The reversal of 8163381 is 1833618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8163381 - 2¹¹ = 8161333 is a prime.

It is a super-2 number, since 2×8163381² = 133281578702322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1360561 + ... + 1360566.

It is an arithmetic number, because the mean of its divisors is an integer number (2721128).

Almost surely, 2^8163381 is an apocalyptic number.

It is an amenable number.

8163381 is a deficient number, since it is larger than the sum of its proper divisors (2721131).

8163381 is a wasteful number, since it uses less digits than its factorization.

8163381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721130.

The product of its digits is 3456, while the sum is 30.

The square root of 8163381 is about 2857.1631034997. The cubic root of 8163381 is about 201.3523435578.

Adding to 8163381 its reverse (1833618), we get a palindrome (9996999).

The spelling of 8163381 in words is "eight million, one hundred sixty-three thousand, three hundred eighty-one".