71385517 has 8 divisors (see below), whose sum is σ = 82332800. Its totient is φ = 60625584.

The previous prime is 71385493. The next prime is 71385539. The reversal of 71385517 is 71558317.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71385517 - 2¹¹ = 71383469 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 (71385817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46017 + ... + 47542.

It is an arithmetic number, because the mean of its divisors is an integer number (10291600).

Almost surely, 2^71385517 is an apocalyptic number.

It is an amenable number.

71385517 is a deficient number, since it is larger than the sum of its proper divisors (10947283).

71385517 is a wasteful number, since it uses less digits than its factorization.

71385517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93675.

The product of its digits is 29400, while the sum is 37.

The square root of 71385517 is about 8448.9950289961. The cubic root of 71385517 is about 414.8298852777.

The spelling of 71385517 in words is "seventy-one million, three hundred eighty-five thousand, five hundred seventeen".