71055643 has 4 divisors (see below), whose sum is σ = 71684568. Its totient is φ = 70426720.

The previous prime is 71055641. The next prime is 71055653. The reversal of 71055643 is 34655017.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71055643 - 2¹ = 71055641 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71055641) 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 3 ways as a sum of consecutive naturals, for example, 314293 + ... + 314518.

It is an arithmetic number, because the mean of its divisors is an integer number (17921142).

Almost surely, 2^71055643 is an apocalyptic number.

71055643 is a deficient number, since it is larger than the sum of its proper divisors (628925).

71055643 is a wasteful number, since it uses less digits than its factorization.

71055643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628924.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 71055643 is about 8429.4509311105. The cubic root of 71055643 is about 414.1899192417.

The spelling of 71055643 in words is "seventy-one million, fifty-five thousand, six hundred forty-three".