52722121 has 9 divisors (see below), whose sum is σ = 54130741. Its totient is φ = 51349792.

The previous prime is 52722097. The next prime is 52722167. The reversal of 52722121 is 12122725.

The square root of 52722121 is 7261.

It is a perfect power (a square), and thus also a powerful number.

52722121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5112121 + 47610000 = 2261^2 + 6900^2 .

It is not a de Polignac number, because 52722121 - 2¹³ = 52713929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52722092 and 52722101.

It is not an unprimeable number, because it can be changed into a prime (52722421) 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 8 ways as a sum of consecutive naturals, for example, 384765 + ... + 384901.

Almost surely, 2^52722121 is an apocalyptic number.

52722121 is the 7261-st square number.

52722121 is the 3631-st centered octagonal number.

It is an amenable number.

52722121 is a deficient number, since it is larger than the sum of its proper divisors (1408620).

52722121 is an frugal number, since it uses more digits than its factorization.

52722121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 190 counting only the distinct ones).

The product of its digits is 560, while the sum is 22.

The cubic root of 52722121 is about 374.9709512313.

Adding to 52722121 its reverse (12122725), we get a palindrome (64844846).

The spelling of 52722121 in words is "fifty-two million, seven hundred twenty-two thousand, one hundred twenty-one".