71224543 has 16 divisors (see below), whose sum is σ = 81738720. Its totient is φ = 61845888.

The previous prime is 71224529. The next prime is 71224547. The reversal of 71224543 is 34542217.

It is not a de Polignac number, because 71224543 - 2²¹ = 69127391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71224547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36396 + ... + 38302.

It is an arithmetic number, because the mean of its divisors is an integer number (5108670).

Almost surely, 2^71224543 is an apocalyptic number.

71224543 is a deficient number, since it is larger than the sum of its proper divisors (10514177).

71224543 is a wasteful number, since it uses less digits than its factorization.

71224543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963 (or 1937 counting only the distinct ones).

The product of its digits is 6720, while the sum is 28.

The square root of 71224543 is about 8439.4634308112. The cubic root of 71224543 is about 414.5178374677.

The spelling of 71224543 in words is "seventy-one million, two hundred twenty-four thousand, five hundred forty-three".