71957216 has 12 divisors (see below), whose sum is σ = 141665832. Its totient is φ = 35978592.

The previous prime is 71957213. The next prime is 71957227. The reversal of 71957216 is 61275917.

It is a self number, because there is not a number n which added to its sum of digits gives 71957216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71957213) by changing a digit.

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 as a sum of consecutive naturals, namely, 1124300 + ... + 1124363.

It is an arithmetic number, because the mean of its divisors is an integer number (11805486).

Almost surely, 2^71957216 is an apocalyptic number.

It is an amenable number.

71957216 is a deficient number, since it is larger than the sum of its proper divisors (69708616).

71957216 is a wasteful number, since it uses less digits than its factorization.

71957216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248673 (or 2248665 counting only the distinct ones).

The product of its digits is 26460, while the sum is 38.

The square root of 71957216 is about 8482.7599282309. The cubic root of 71957216 is about 415.9343461478.

The spelling of 71957216 in words is "seventy-one million, nine hundred fifty-seven thousand, two hundred sixteen".