71213443 has 4 divisors (see below), whose sum is σ = 81386800. Its totient is φ = 61040088.

The previous prime is 71213437. The next prime is 71213477. The reversal of 71213443 is 34431217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34431217 = 97 ⋅354961.

It is a cyclic number.

It is not a de Polignac number, because 71213443 - 2¹⁷ = 71082371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71213143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5086668 + ... + 5086681.

It is an arithmetic number, because the mean of its divisors is an integer number (20346700).

Almost surely, 2^71213443 is an apocalyptic number.

71213443 is a deficient number, since it is larger than the sum of its proper divisors (10173357).

71213443 is a wasteful number, since it uses less digits than its factorization.

71213443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10173356.

The product of its digits is 2016, while the sum is 25.

The square root of 71213443 is about 8438.8057804407. The cubic root of 71213443 is about 414.4963028166.

The spelling of 71213443 in words is "seventy-one million, two hundred thirteen thousand, four hundred forty-three".