81133224010 has 48 divisors (see below), whose sum is σ = 149928498720. Its totient is φ = 31602441440.

The previous prime is 81133223989. The next prime is 81133224019. The reversal of 81133224010 is 1042233118.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81133224019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6748905 + ... + 6760915.

It is an arithmetic number, because the mean of its divisors is an integer number (3123510390).

Almost surely, 2^81133224010 is an apocalyptic number.

81133224010 is a deficient number, since it is larger than the sum of its proper divisors (68795274710).

81133224010 is a wasteful number, since it uses less digits than its factorization.

81133224010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12291 (or 12184 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 81133224010 its reverse (1042233118), we get a palindrome (82175457128).

The spelling of 81133224010 in words is "eighty-one billion, one hundred thirty-three million, two hundred twenty-four thousand, ten".