71315015 has 4 divisors (see below), whose sum is σ = 85578024. Its totient is φ = 57052008.

The previous prime is 71314987. The next prime is 71315029. The reversal of 71315015 is 51051317.

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 71315015 - 2¹² = 71310919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7131497 + ... + 7131506.

It is an arithmetic number, because the mean of its divisors is an integer number (21394506).

Almost surely, 2^71315015 is an apocalyptic number.

71315015 is a deficient number, since it is larger than the sum of its proper divisors (14263009).

71315015 is a wasteful number, since it uses less digits than its factorization.

71315015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14263008.

The product of its (nonzero) digits is 525, while the sum is 23.

The square root of 71315015 is about 8444.8217861598. The cubic root of 71315015 is about 414.6932750743.

The spelling of 71315015 in words is "seventy-one million, three hundred fifteen thousand, fifteen".