71243020472 has 32 divisors (see below), whose sum is σ = 144579036000. Its totient is φ = 32716151424.

The previous prime is 71243020441. The next prime is 71243020489. The reversal of 71243020472 is 27402034217.

It is a super-2 number, since 2×71243020472² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1700483 + ... + 1741874.

It is an arithmetic number, because the mean of its divisors is an integer number (4518094875).

Almost surely, 2^71243020472 is an apocalyptic number.

It is an amenable number.

71243020472 is an abundant number, since it is smaller than the sum of its proper divisors (73336015528).

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

71243020472 is a wasteful number, since it uses less digits than its factorization.

71243020472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442575 (or 3442571 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 32.

Adding to 71243020472 its reverse (27402034217), we get a palindrome (98645054689).

The spelling of 71243020472 in words is "seventy-one billion, two hundred forty-three million, twenty thousand, four hundred seventy-two".