8181922 has 16 divisors (see below), whose sum is σ = 14313600. Its totient is φ = 3506244.

The previous prime is 8181917. The next prime is 8181931. The reversal of 8181922 is 2291818.

It is a happy number.

It is a super-2 number, since 2×8181922² = 133887695228168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5278 + ... + 6649.

It is an arithmetic number, because the mean of its divisors is an integer number (894600).

Almost surely, 2^8181922 is an apocalyptic number.

8181922 is a deficient number, since it is larger than the sum of its proper divisors (6131678).

8181922 is a wasteful number, since it uses less digits than its factorization.

8181922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11950 (or 11936 counting only the distinct ones).

The product of its digits is 2304, while the sum is 31.

The square root of 8181922 is about 2860.4059152505. The cubic root of 8181922 is about 201.5046681471.

The spelling of 8181922 in words is "eight million, one hundred eighty-one thousand, nine hundred twenty-two".