71113812 has 48 divisors (see below), whose sum is σ = 206879232. Its totient is φ = 18470880.

The previous prime is 71113807. The next prime is 71113817. The reversal of 71113812 is 21831117.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71113807) and next prime (71113817).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71113817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37558 + ... + 39405.

It is an arithmetic number, because the mean of its divisors is an integer number (4309984).

Almost surely, 2^71113812 is an apocalyptic number.

It is an amenable number.

71113812 is an abundant number, since it is smaller than the sum of its proper divisors (135765420).

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

71113812 is a wasteful number, since it uses less digits than its factorization.

71113812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76988 (or 76986 counting only the distinct ones).

The product of its digits is 336, while the sum is 24.

The square root of 71113812 is about 8432.9005686063. The cubic root of 71113812 is about 414.3029125752.

Adding to 71113812 its reverse (21831117), we get a palindrome (92944929).

The spelling of 71113812 in words is "seventy-one million, one hundred thirteen thousand, eight hundred twelve".