722216771 has 4 divisors (see below), whose sum is σ = 760228200. Its totient is φ = 684205344.

The previous prime is 722216753. The next prime is 722216779. The reversal of 722216771 is 177612227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 722216771 - 2⁶ = 722216707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722216779) 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 in 3 ways as a sum of consecutive naturals, for example, 19005686 + ... + 19005723.

It is an arithmetic number, because the mean of its divisors is an integer number (190057050).

Almost surely, 2^722216771 is an apocalyptic number.

722216771 is a deficient number, since it is larger than the sum of its proper divisors (38011429).

722216771 is a wasteful number, since it uses less digits than its factorization.

722216771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38011428.

The product of its digits is 16464, while the sum is 35.

The square root of 722216771 is about 26874.0910730019. The cubic root of 722216771 is about 897.1998446944.

Adding to 722216771 its reverse (177612227), we get a palindrome (899828998).

The spelling of 722216771 in words is "seven hundred twenty-two million, two hundred sixteen thousand, seven hundred seventy-one".