52201999981 has 2 divisors, whose sum is σ = 52201999982. Its totient is φ = 52201999980.

The previous prime is 52201999963. The next prime is 52202000009. The reversal of 52201999981 is 18999910225.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32857362756 + 19344637225 = 181266^2 + 139085^2 .

It is a cyclic number.

It is not a de Polignac number, because 52201999981 - 2⁷ = 52201999853 is a prime.

It is a super-2 number, since 2×52201999981² (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 (52201999921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26100999990 + 26100999991.

It is an arithmetic number, because the mean of its divisors is an integer number (26100999991).

Almost surely, 2^52201999981 is an apocalyptic number.

It is an amenable number.

52201999981 is a deficient number, since it is larger than the sum of its proper divisors (1).

52201999981 is an equidigital number, since it uses as much as digits as its factorization.

52201999981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 55.

The spelling of 52201999981 in words is "fifty-two billion, two hundred one million, nine hundred ninety-nine thousand, nine hundred eighty-one".