71543073 has 16 divisors (see below), whose sum is σ = 111678336. Its totient is φ = 39884160.

The previous prime is 71543053. The next prime is 71543081. The reversal of 71543073 is 37034517.

It is not a de Polignac number, because 71543073 - 2¹² = 71538977 is a prime.

It is a super-2 number, since 2×71543073² = 10236822588566658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71543073.

It is not an unprimeable number, because it can be changed into a prime (71543023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40686 + ... + 42407.

It is an arithmetic number, because the mean of its divisors is an integer number (6979896).

Almost surely, 2^71543073 is an apocalyptic number.

It is an amenable number.

71543073 is a deficient number, since it is larger than the sum of its proper divisors (40135263).

71543073 is a wasteful number, since it uses less digits than its factorization.

71543073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83144.

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 71543073 is about 8458.3138390580. The cubic root of 71543073 is about 415.1348533540.

The spelling of 71543073 in words is "seventy-one million, five hundred forty-three thousand, seventy-three".