71431216 has 10 divisors (see below), whose sum is σ = 138398012. Its totient is φ = 35715600.

The previous prime is 71431207. The next prime is 71431253. The reversal of 71431216 is 61213417.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2232210 + ... + 2232241.

Almost surely, 2^71431216 is an apocalyptic number.

It is an amenable number.

71431216 is a deficient number, since it is larger than the sum of its proper divisors (66966796).

71431216 is a wasteful number, since it uses less digits than its factorization.

71431216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4464459 (or 4464453 counting only the distinct ones).

The product of its digits is 1008, while the sum is 25.

The square root of 71431216 is about 8451.6990007927. The cubic root of 71431216 is about 414.9183872029.

The spelling of 71431216 in words is "seventy-one million, four hundred thirty-one thousand, two hundred sixteen".