81350112 has 48 divisors (see below), whose sum is σ = 214053840. Its totient is φ = 27052032.

The previous prime is 81350099. The next prime is 81350119. The reversal of 81350112 is 21105318.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81350119) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 56214 + ... + 57642.

It is an arithmetic number, because the mean of its divisors is an integer number (4459455).

Almost surely, 2^81350112 is an apocalyptic number.

It is an amenable number.

81350112 is an abundant number, since it is smaller than the sum of its proper divisors (132703728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81350112 is a wasteful number, since it uses less digits than its factorization.

81350112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035 (or 2027 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 81350112 is about 9019.4296937223. The cubic root of 81350112 is about 433.2973687443.

The spelling of 81350112 in words is "eighty-one million, three hundred fifty thousand, one hundred twelve".