52171112509 has 2 divisors, whose sum is σ = 52171112510. Its totient is φ = 52171112508.

The previous prime is 52171112423. The next prime is 52171112527. The reversal of 52171112509 is 90521117125.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50691171609 + 1479940900 = 225147^2 + 38470^2 .

It is a cyclic number.

It is not a de Polignac number, because 52171112509 - 2⁷ = 52171112381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52171112579) 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 as a sum of consecutive naturals, namely, 26085556254 + 26085556255.

It is an arithmetic number, because the mean of its divisors is an integer number (26085556255).

Almost surely, 2^52171112509 is an apocalyptic number.

It is an amenable number.

52171112509 is a deficient number, since it is larger than the sum of its proper divisors (1).

52171112509 is an equidigital number, since it uses as much as digits as its factorization.

52171112509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 34.

It can be divided in two parts, 52 and 171112509, that added together give a square (171112561 = 13081²).

The spelling of 52171112509 in words is "fifty-two billion, one hundred seventy-one million, one hundred twelve thousand, five hundred nine".