71385215 has 16 divisors (see below), whose sum is σ = 97514496. Its totient is φ = 49658400.

The previous prime is 71385191. The next prime is 71385233. The reversal of 71385215 is 51258317.

It is not a de Polignac number, because 71385215 - 2¹⁰ = 71384191 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26951 + ... + 29480.

It is an arithmetic number, because the mean of its divisors is an integer number (6094656).

Almost surely, 2^71385215 is an apocalyptic number.

71385215 is a deficient number, since it is larger than the sum of its proper divisors (26129281).

71385215 is a wasteful number, since it uses less digits than its factorization.

71385215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56470.

The product of its digits is 8400, while the sum is 32.

The square root of 71385215 is about 8448.9771570291. The cubic root of 71385215 is about 414.8293002907.

The spelling of 71385215 in words is "seventy-one million, three hundred eighty-five thousand, two hundred fifteen".