71522012 has 12 divisors (see below), whose sum is σ = 127215816. Its totient is φ = 35174640.

The previous prime is 71521997. The next prime is 71522041. The reversal of 71522012 is 21022517.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 146318 + ... + 146805.

It is an arithmetic number, because the mean of its divisors is an integer number (10601318).

Almost surely, 2^71522012 is an apocalyptic number.

It is an amenable number.

71522012 is a deficient number, since it is larger than the sum of its proper divisors (55693804).

71522012 is a wasteful number, since it uses less digits than its factorization.

71522012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293188 (or 293186 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 71522012 is about 8457.0687593279. The cubic root of 71522012 is about 415.0941132662.

Adding to 71522012 its reverse (21022517), we get a palindrome (92544529).

The spelling of 71522012 in words is "seventy-one million, five hundred twenty-two thousand, twelve".