81822476 has 12 divisors (see below), whose sum is σ = 143708208. Its totient is φ = 40762992.

The previous prime is 81822473. The next prime is 81822487. The reversal of 81822476 is 67422818.

It is not an unprimeable number, because it can be changed into a prime (81822473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35816 + ... + 38031.

It is an arithmetic number, because the mean of its divisors is an integer number (11975684).

Almost surely, 2^81822476 is an apocalyptic number.

It is an amenable number.

81822476 is a deficient number, since it is larger than the sum of its proper divisors (61885732).

81822476 is a wasteful number, since it uses less digits than its factorization.

81822476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74128 (or 74126 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 81822476 is about 9045.5777040496. The cubic root of 81822476 is about 434.1344059069.

The spelling of 81822476 in words is "eighty-one million, eight hundred twenty-two thousand, four hundred seventy-six".