52209825581 has 2 divisors, whose sum is σ = 52209825582. Its totient is φ = 52209825580.

The previous prime is 52209825557. The next prime is 52209825589. The reversal of 52209825581 is 18552890225.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49357731556 + 2852094025 = 222166^2 + 53405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52209825581 is a prime.

It is a super-2 number, since 2×52209825581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52209825589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26104912790 + 26104912791.

It is an arithmetic number, because the mean of its divisors is an integer number (26104912791).

Almost surely, 2^52209825581 is an apocalyptic number.

It is an amenable number.

52209825581 is a deficient number, since it is larger than the sum of its proper divisors (1).

52209825581 is an equidigital number, since it uses as much as digits as its factorization.

52209825581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576000, while the sum is 47.

The spelling of 52209825581 in words is "fifty-two billion, two hundred nine million, eight hundred twenty-five thousand, five hundred eighty-one".