71216331 has 8 divisors (see below), whose sum is σ = 98018304. Its totient is φ = 45945960.

The previous prime is 71216323. The next prime is 71216347. The reversal of 71216331 is 13361217.

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

It is not a de Polignac number, because 71216331 - 2³ = 71216323 is a prime.

It is a super-2 number, since 2×71216331² = 10143531602203122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71216371) 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, 382791 + ... + 382976.

It is an arithmetic number, because the mean of its divisors is an integer number (12252288).

Almost surely, 2^71216331 is an apocalyptic number.

71216331 is a deficient number, since it is larger than the sum of its proper divisors (26801973).

71216331 is a wasteful number, since it uses less digits than its factorization.

71216331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765801.

The product of its digits is 756, while the sum is 24.

The square root of 71216331 is about 8438.9768929652. The cubic root of 71216331 is about 414.5019059214.

Adding to 71216331 its reverse (13361217), we get a palindrome (84577548).

The spelling of 71216331 in words is "seventy-one million, two hundred sixteen thousand, three hundred thirty-one".