71885215 has 4 divisors (see below), whose sum is σ = 86262264. Its totient is φ = 57508168.

The previous prime is 71885183. The next prime is 71885237. The reversal of 71885215 is 51258817.

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 71885215 - 2⁵ = 71885183 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7188517 + ... + 7188526.

It is an arithmetic number, because the mean of its divisors is an integer number (21565566).

Almost surely, 2^71885215 is an apocalyptic number.

71885215 is a deficient number, since it is larger than the sum of its proper divisors (14377049).

71885215 is a wasteful number, since it uses less digits than its factorization.

71885215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14377048.

The product of its digits is 22400, while the sum is 37.

The square root of 71885215 is about 8478.5149053357. The cubic root of 71885215 is about 415.7955707073.

It can be divided in two parts, 7188 and 5215, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 71885215 in words is "seventy-one million, eight hundred eighty-five thousand, two hundred fifteen".