71316415 has 4 divisors (see below), whose sum is σ = 85579704. Its totient is φ = 57053128.

The previous prime is 71316409. The next prime is 71316431. The reversal of 71316415 is 51461317.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71316415 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7131637 + ... + 7131646.

It is an arithmetic number, because the mean of its divisors is an integer number (21394926).

Almost surely, 2^71316415 is an apocalyptic number.

71316415 is a deficient number, since it is larger than the sum of its proper divisors (14263289).

71316415 is a wasteful number, since it uses less digits than its factorization.

71316415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14263288.

The product of its digits is 2520, while the sum is 28.

The square root of 71316415 is about 8444.9046767859. The cubic root of 71316415 is about 414.6959887001.

The spelling of 71316415 in words is "seventy-one million, three hundred sixteen thousand, four hundred fifteen".