71520043 has 16 divisors (see below), whose sum is σ = 83246080. Its totient is φ = 60181056.

The previous prime is 71520017. The next prime is 71520067. The reversal of 71520043 is 34002517.

It is a cyclic number.

It is not a de Polignac number, because 71520043 - 2⁵ = 71520011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71519996 and 71520023.

It is not an unprimeable number, because it can be changed into a prime (71520083) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 156271 + ... + 156727.

It is an arithmetic number, because the mean of its divisors is an integer number (5202880).

Almost surely, 2^71520043 is an apocalyptic number.

71520043 is a deficient number, since it is larger than the sum of its proper divisors (11726037).

71520043 is a wasteful number, since it uses less digits than its factorization.

71520043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 71520043 is about 8456.9523470338. The cubic root of 71520043 is about 415.0903040529.

The spelling of 71520043 in words is "seventy-one million, five hundred twenty thousand, forty-three".