71051565 has 32 divisors (see below), whose sum is σ = 125427456. Its totient is φ = 34122240.

The previous prime is 71051549. The next prime is 71051579. The reversal of 71051565 is 56515017.

It is not a de Polignac number, because 71051565 - 2⁴ = 71051549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3552 + ... + 12438.

It is an arithmetic number, because the mean of its divisors is an integer number (3919608).

Almost surely, 2^71051565 is an apocalyptic number.

It is an amenable number.

71051565 is a deficient number, since it is larger than the sum of its proper divisors (54375891).

71051565 is a wasteful number, since it uses less digits than its factorization.

71051565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8949.

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 71051565 is about 8429.2090376262. The cubic root of 71051565 is about 414.1819954103.

The spelling of 71051565 in words is "seventy-one million, fifty-one thousand, five hundred sixty-five".