81233368 has 8 divisors (see below), whose sum is σ = 152312580. Its totient is φ = 40616680.

The previous prime is 81233359. The next prime is 81233381. The reversal of 81233368 is 86333218.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5077078 + ... + 5077093.

Almost surely, 2^81233368 is an apocalyptic number.

It is an amenable number.

81233368 is a deficient number, since it is larger than the sum of its proper divisors (71079212).

81233368 is a wasteful number, since it uses less digits than its factorization.

81233368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10154177 (or 10154173 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 81233368 is about 9012.9555640755. The cubic root of 81233368 is about 433.0899972408.

The spelling of 81233368 in words is "eighty-one million, two hundred thirty-three thousand, three hundred sixty-eight".