71315567 has 4 divisors (see below), whose sum is σ = 71392296. Its totient is φ = 71238840.

The previous prime is 71315557. The next prime is 71315599. The reversal of 71315567 is 76551317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76551317 = 3797 ⋅20161.

It is a cyclic number.

It is not a de Polignac number, because 71315567 - 2¹⁶ = 71250031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71315507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36953 + ... + 38834.

It is an arithmetic number, because the mean of its divisors is an integer number (17848074).

Almost surely, 2^71315567 is an apocalyptic number.

71315567 is a deficient number, since it is larger than the sum of its proper divisors (76729).

71315567 is an equidigital number, since it uses as much as digits as its factorization.

71315567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76728.

The product of its digits is 22050, while the sum is 35.

The square root of 71315567 is about 8444.8544688467. The cubic root of 71315567 is about 414.6943450224.

The spelling of 71315567 in words is "seventy-one million, three hundred fifteen thousand, five hundred sixty-seven".