81576922 has 16 divisors (see below), whose sum is σ = 141935040. Its totient is φ = 34439328.

The previous prime is 81576919. The next prime is 81576949. The reversal of 81576922 is 22967518.

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, 42547 + ... + 44422.

It is an arithmetic number, because the mean of its divisors is an integer number (8870940).

Almost surely, 2^81576922 is an apocalyptic number.

81576922 is a deficient number, since it is larger than the sum of its proper divisors (60358118).

81576922 is a wasteful number, since it uses less digits than its factorization.

81576922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87045.

The product of its digits is 60480, while the sum is 40.

The square root of 81576922 is about 9031.9943534083. The cubic root of 81576922 is about 433.6996832231.

The spelling of 81576922 in words is "eighty-one million, five hundred seventy-six thousand, nine hundred twenty-two".