71509056 has 28 divisors (see below), whose sum is σ = 189201552. Its totient is φ = 23836288.

The previous prime is 71509051. The next prime is 71509057. The reversal of 71509056 is 65090517.

It is a super-2 number, since 2×71509056² = 10227090180022272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71509051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186030 + ... + 186413.

Almost surely, 2^71509056 is an apocalyptic number.

It is an amenable number.

71509056 is an abundant number, since it is smaller than the sum of its proper divisors (117692496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71509056 is a wasteful number, since it uses less digits than its factorization.

71509056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372458 (or 372448 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 33.

The square root of 71509056 is about 8456.3027381947. The cubic root of 71509056 is about 415.0690473975.

The spelling of 71509056 in words is "seventy-one million, five hundred nine thousand, fifty-six".