71209056 has 48 divisors (see below), whose sum is σ = 197923824. Its totient is φ = 22339584.

The previous prime is 71209043. The next prime is 71209063. The reversal of 71209056 is 65090217.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×71209056² = 10141459312822272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20185 + ... + 23448.

It is an arithmetic number, because the mean of its divisors is an integer number (4123413).

Almost surely, 2^71209056 is an apocalyptic number.

It is an amenable number.

71209056 is an abundant number, since it is smaller than the sum of its proper divisors (126714768).

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

71209056 is a wasteful number, since it uses less digits than its factorization.

71209056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43663 (or 43655 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 71209056 is about 8438.5458462937. The cubic root of 71209056 is about 414.4877911623.

The spelling of 71209056 in words is "seventy-one million, two hundred nine thousand, fifty-six".