71731112 has 32 divisors (see below), whose sum is σ = 141825600. Its totient is φ = 33944064.

The previous prime is 71731111. The next prime is 71731141. The reversal of 71731112 is 21113717.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (71731111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15839 + ... + 19857.

It is an arithmetic number, because the mean of its divisors is an integer number (4432050).

Almost surely, 2^71731112 is an apocalyptic number.

It is an amenable number.

71731112 is a deficient number, since it is larger than the sum of its proper divisors (70094488).

71731112 is a wasteful number, since it uses less digits than its factorization.

71731112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4145 (or 4141 counting only the distinct ones).

The product of its digits is 294, while the sum is 23.

The square root of 71731112 is about 8469.4221762763. The cubic root of 71731112 is about 415.4982393467.

Adding to 71731112 its reverse (21113717), we get a palindrome (92844829).

The spelling of 71731112 in words is "seventy-one million, seven hundred thirty-one thousand, one hundred twelve".