52716221 has 4 divisors (see below), whose sum is σ = 52741344. Its totient is φ = 52691100.

The previous prime is 52716211. The next prime is 52716263. The reversal of 52716221 is 12261725.

52716221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52716221 - 2¹⁰ = 52715197 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 (52716211) 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, 9095 + ... + 13716.

It is an arithmetic number, because the mean of its divisors is an integer number (13185336).

Almost surely, 2^52716221 is an apocalyptic number.

It is an amenable number.

52716221 is a deficient number, since it is larger than the sum of its proper divisors (25123).

52716221 is a wasteful number, since it uses less digits than its factorization.

52716221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25122.

The product of its digits is 1680, while the sum is 26.

The square root of 52716221 is about 7260.5937085062. The cubic root of 52716221 is about 374.9569633574.

Adding to 52716221 its reverse (12261725), we get a palindrome (64977946).

The spelling of 52716221 in words is "fifty-two million, seven hundred sixteen thousand, two hundred twenty-one".