53852307721 has 9 divisors (see below), whose sum is σ = 54376439061. Its totient is φ = 53333187264.

The previous prime is 53852307703. The next prime is 53852307731. The reversal of 53852307721 is 12770325835.

It is a happy number.

The square root of 53852307721 is 232061.

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

It can be written as a sum of positive squares in 4 ways, for example, as 167417721 + 53684890000 = 12939^2 + 231700^2 .

It is not a de Polignac number, because 53852307721 - 2²⁷ = 53718089993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53852307731) 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, 25293585 + ... + 25295713.

Almost surely, 2^53852307721 is an apocalyptic number.

53852307721 is the 232061-st square number.

53852307721 is the 116031-st centered octagonal number.

It is an amenable number.

53852307721 is a deficient number, since it is larger than the sum of its proper divisors (524131340).

53852307721 is an frugal number, since it uses more digits than its factorization.

53852307721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4476 (or 2238 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 53852307721 in words is "fifty-three billion, eight hundred fifty-two million, three hundred seven thousand, seven hundred twenty-one".