716856221 has 8 divisors (see below), whose sum is σ = 764487360. Its totient is φ = 669832128.

The previous prime is 716856211. The next prime is 716856227. The reversal of 716856221 is 122658617.

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

It is a cyclic number.

It is not a de Polignac number, because 716856221 - 2¹⁰ = 716855197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716856227) 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, 149321 + ... + 154046.

It is an arithmetic number, because the mean of its divisors is an integer number (95560920).

Almost surely, 2^716856221 is an apocalyptic number.

It is an amenable number.

716856221 is a deficient number, since it is larger than the sum of its proper divisors (47631139).

716856221 is a wasteful number, since it uses less digits than its factorization.

716856221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303523.

The product of its digits is 40320, while the sum is 38.

The square root of 716856221 is about 26774.1707808104. The cubic root of 716856221 is about 894.9745510486.

The spelling of 716856221 in words is "seven hundred sixteen million, eight hundred fifty-six thousand, two hundred twenty-one".