81246232 has 8 divisors (see below), whose sum is σ = 152336700. Its totient is φ = 40623112.

The previous prime is 81246229. The next prime is 81246241. The reversal of 81246232 is 23264218.

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

It is a self number, because there is not a number n which added to its sum of digits gives 81246232.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5077882 + ... + 5077897.

Almost surely, 2^81246232 is an apocalyptic number.

It is an amenable number.

81246232 is a deficient number, since it is larger than the sum of its proper divisors (71090468).

81246232 is a wasteful number, since it uses less digits than its factorization.

81246232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10155785 (or 10155781 counting only the distinct ones).

The product of its digits is 4608, while the sum is 28.

The square root of 81246232 is about 9013.6691752027. The cubic root of 81246232 is about 433.1128572050.

The spelling of 81246232 in words is "eighty-one million, two hundred forty-six thousand, two hundred thirty-two".