52191838481 has 2 divisors, whose sum is σ = 52191838482. Its totient is φ = 52191838480.

The previous prime is 52191838453. The next prime is 52191838553. The reversal of 52191838481 is 18483819125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43049610256 + 9142228225 = 207484^2 + 95615^2 .

It is a cyclic number.

It is not a de Polignac number, because 52191838481 - 2⁶ = 52191838417 is a prime.

It is a super-2 number, since 2×52191838481² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (52191838451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26095919240 + 26095919241.

It is an arithmetic number, because the mean of its divisors is an integer number (26095919241).

Almost surely, 2^52191838481 is an apocalyptic number.

It is an amenable number.

52191838481 is a deficient number, since it is larger than the sum of its proper divisors (1).

52191838481 is an equidigital number, since it uses as much as digits as its factorization.

52191838481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 50.

The spelling of 52191838481 in words is "fifty-two billion, one hundred ninety-one million, eight hundred thirty-eight thousand, four hundred eighty-one".