71522812 has 12 divisors (see below), whose sum is σ = 125230896. Its totient is φ = 35742560.

The previous prime is 71522779. The next prime is 71522827. The reversal of 71522812 is 21822517.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7137 + ... + 13927.

It is an arithmetic number, because the mean of its divisors is an integer number (10435908).

Almost surely, 2^71522812 is an apocalyptic number.

It is an amenable number.

71522812 is a deficient number, since it is larger than the sum of its proper divisors (53708084).

71522812 is a wasteful number, since it uses less digits than its factorization.

71522812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9428 (or 9426 counting only the distinct ones).

The product of its digits is 2240, while the sum is 28.

The square root of 71522812 is about 8457.1160569073. The cubic root of 71522812 is about 415.0956609205.

The spelling of 71522812 in words is "seventy-one million, five hundred twenty-two thousand, eight hundred twelve".