52491850321 has 9 divisors (see below), whose sum is σ = 52805063131. Its totient is φ = 52180488472.

The previous prime is 52491850291. The next prime is 52491850331. The reversal of 52491850321 is 12305819425.

It is a happy number.

The square root of 52491850321 is 229111.

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

It can be written as a sum of positive squares in only one way, i.e., 51431436225 + 1060414096 = 226785^2 + 32564^2 .

It is not a de Polignac number, because 52491850321 - 2¹³ = 52491842129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52491850331) 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, 45134286 + ... + 45135448.

Almost surely, 2^52491850321 is an apocalyptic number.

52491850321 is the 229111-st square number.

52491850321 is the 114556-th centered octagonal number.

It is an amenable number.

52491850321 is a deficient number, since it is larger than the sum of its proper divisors (313212810).

52491850321 is an frugal number, since it uses more digits than its factorization.

52491850321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720 (or 1360 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 52491850321 in words is "fifty-two billion, four hundred ninety-one million, eight hundred fifty thousand, three hundred twenty-one".