81822248 has 16 divisors (see below), whose sum is σ = 156312180. Its totient is φ = 40139008.

The previous prime is 81822187. The next prime is 81822271. The reversal of 81822248 is 84222818.

It can be written as a sum of positive squares in 2 ways, for example, as 64995844 + 16826404 = 8062^2 + 4102^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96065 + ... + 96912.

Almost surely, 2^81822248 is an apocalyptic number.

It is an amenable number.

81822248 is a deficient number, since it is larger than the sum of its proper divisors (74489932).

81822248 is a wasteful number, since it uses less digits than its factorization.

81822248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193036 (or 193032 counting only the distinct ones).

The product of its digits is 16384, while the sum is 35.

The square root of 81822248 is about 9045.5651011974. The cubic root of 81822248 is about 434.1340026651.

The spelling of 81822248 in words is "eighty-one million, eight hundred twenty-two thousand, two hundred forty-eight".