71564115 has 16 divisors (see below), whose sum is σ = 130860288. Its totient is φ = 32714976.

The previous prime is 71564111. The next prime is 71564117. The reversal of 71564115 is 51146517.

It is not a de Polignac number, because 71564115 - 2² = 71564111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71564111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340677 + ... + 340886.

It is an arithmetic number, because the mean of its divisors is an integer number (8178768).

Almost surely, 2^71564115 is an apocalyptic number.

71564115 is a deficient number, since it is larger than the sum of its proper divisors (59296173).

71564115 is a wasteful number, since it uses less digits than its factorization.

71564115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681578.

The product of its digits is 4200, while the sum is 30.

The square root of 71564115 is about 8459.5576125469. The cubic root of 71564115 is about 415.1755487047.

The spelling of 71564115 in words is "seventy-one million, five hundred sixty-four thousand, one hundred fifteen".