10716221 has 4 divisors (see below), whose sum is σ = 10743612. Its totient is φ = 10688832.

The previous prime is 10716217. The next prime is 10716227. The reversal of 10716221 is 12261701.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3290596 + 7425625 = 1814^2 + 2725^2 .

It is a cyclic number.

It is not a de Polignac number, because 10716221 - 2² = 10716217 is a prime.

It is a super-2 number, since 2×10716221² = 229674785041682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10716193 and 10716202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10716227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13100 + ... + 13893.

It is an arithmetic number, because the mean of its divisors is an integer number (2685903).

Almost surely, 2^10716221 is an apocalyptic number.

It is an amenable number.

10716221 is a deficient number, since it is larger than the sum of its proper divisors (27391).

10716221 is an equidigital number, since it uses as much as digits as its factorization.

10716221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27390.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 10716221 is about 3273.5639599678. The cubic root of 10716221 is about 220.4688417400.

Adding to 10716221 its reverse (12261701), we get a palindrome (22977922).

The spelling of 10716221 in words is "ten million, seven hundred sixteen thousand, two hundred twenty-one".