71181513252212 has 48 divisors (see below), whose sum is σ = 135992461464384. Its totient is φ = 32331312000000.

The previous prime is 71181513252211. The next prime is 71181513252263. The reversal of 71181513252212 is 21225231518117.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 71181513252212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71181513252211) 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, 1468211012 + ... + 1468259492.

It is an arithmetic number, because the mean of its divisors is an integer number (2833176280508).

Almost surely, 2^{71181513252212} is an apocalyptic number.

It is an amenable number.

71181513252212 is a deficient number, since it is larger than the sum of its proper divisors (64810948212172).

71181513252212 is a wasteful number, since it uses less digits than its factorization.

71181513252212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72480 (or 72478 counting only the distinct ones).

The product of its digits is 67200, while the sum is 41.

The spelling of 71181513252212 in words is "seventy-one trillion, one hundred eighty-one billion, five hundred thirteen million, two hundred fifty-two thousand, two hundred twelve".