71591056 has 10 divisors (see below), whose sum is σ = 138707702. Its totient is φ = 35795520.

The previous prime is 71591021. The next prime is 71591081. The reversal of 71591056 is 65019517.

It can be written as a sum of positive squares in only one way, i.e., 70291456 + 1299600 = 8384^2 + 1140^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2237205 + ... + 2237236.

Almost surely, 2^71591056 is an apocalyptic number.

It is an amenable number.

71591056 is a deficient number, since it is larger than the sum of its proper divisors (67116646).

71591056 is a wasteful number, since it uses less digits than its factorization.

71591056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4474449 (or 4474443 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 71591056 is about 8461.1498036614. The cubic root of 71591056 is about 415.2276411123.

The spelling of 71591056 in words is "seventy-one million, five hundred ninety-one thousand, fifty-six".