52226721 has 32 divisors (see below), whose sum is σ = 82955520. Its totient is φ = 32389632.

The previous prime is 52226711. The next prime is 52226731. The reversal of 52226721 is 12762225.

52226721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (52226711) and next prime (52226731).

It is not a de Polignac number, because 52226721 - 2¹⁰ = 52225697 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52226711) 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 31 ways as a sum of consecutive naturals, for example, 21841 + ... + 24113.

It is an arithmetic number, because the mean of its divisors is an integer number (2592360).

Almost surely, 2^52226721 is an apocalyptic number.

It is an amenable number.

52226721 is a deficient number, since it is larger than the sum of its proper divisors (30728799).

52226721 is a wasteful number, since it uses less digits than its factorization.

52226721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342 (or 2336 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 52226721 is about 7226.8057259068. The cubic root of 52226721 is about 373.7927898869.

Adding to 52226721 its reverse (12762225), we get a palindrome (64988946).

The spelling of 52226721 in words is "fifty-two million, two hundred twenty-six thousand, seven hundred twenty-one".