71312315 has 4 divisors (see below), whose sum is σ = 85574784. Its totient is φ = 57049848.

The previous prime is 71312287. The next prime is 71312327. The reversal of 71312315 is 51321317.

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

It is a cyclic number.

It is not a de Polignac number, because 71312315 - 2⁶ = 71312251 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7131227 + ... + 7131236.

It is an arithmetic number, because the mean of its divisors is an integer number (21393696).

Almost surely, 2^71312315 is an apocalyptic number.

71312315 is a deficient number, since it is larger than the sum of its proper divisors (14262469).

71312315 is a wasteful number, since it uses less digits than its factorization.

71312315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14262468.

The product of its digits is 630, while the sum is 23.

The square root of 71312315 is about 8444.6619233691. The cubic root of 71312315 is about 414.6880415529.

The spelling of 71312315 in words is "seventy-one million, three hundred twelve thousand, three hundred fifteen".