71711321 has 8 divisors (see below), whose sum is σ = 82832544. Its totient is φ = 61357120.

The previous prime is 71711281. The next prime is 71711323. The reversal of 71711321 is 12311717.

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

It is a de Polignac number, because none of the positive numbers 2^k-71711321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71711323) 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, 191555 + ... + 191928.

It is an arithmetic number, because the mean of its divisors is an integer number (10354068).

Almost surely, 2^71711321 is an apocalyptic number.

It is an amenable number.

71711321 is a deficient number, since it is larger than the sum of its proper divisors (11121223).

71711321 is a wasteful number, since it uses less digits than its factorization.

71711321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383511.

The product of its digits is 294, while the sum is 23.

The square root of 71711321 is about 8468.2537160857. The cubic root of 71711321 is about 415.4600230981.

The spelling of 71711321 in words is "seventy-one million, seven hundred eleven thousand, three hundred twenty-one".