52805521 has 2 divisors, whose sum is σ = 52805522. Its totient is φ = 52805520.

The previous prime is 52805479. The next prime is 52805551. The reversal of 52805521 is 12550825.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48441600 + 4363921 = 6960^2 + 2089^2 .

It is a cyclic number.

It is not a de Polignac number, because 52805521 - 2¹⁹ = 52281233 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52805521.

It is not a weakly prime, because it can be changed into another prime (52805551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26402760 + 26402761.

It is an arithmetic number, because the mean of its divisors is an integer number (26402761).

Almost surely, 2^52805521 is an apocalyptic number.

It is an amenable number.

52805521 is a deficient number, since it is larger than the sum of its proper divisors (1).

52805521 is an equidigital number, since it uses as much as digits as its factorization.

52805521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 52805521 is about 7266.7407412127. The cubic root of 52805521 is about 375.1685665865.

It can be divided in two parts, 5280 and 5521, that added together give a palindrome (10801).

The spelling of 52805521 in words is "fifty-two million, eight hundred five thousand, five hundred twenty-one".