21752502229 has 2 divisors, whose sum is σ = 21752502230. Its totient is φ = 21752502228.

The previous prime is 21752502197. The next prime is 21752502341. The reversal of 21752502229 is 92220525712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18795861604 + 2956640625 = 137098^2 + 54375^2 .

It is a cyclic number.

It is not a de Polignac number, because 21752502229 - 2⁵ = 21752502197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21752502029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10876251114 + 10876251115.

It is an arithmetic number, because the mean of its divisors is an integer number (10876251115).

Almost surely, 2^21752502229 is an apocalyptic number.

It is an amenable number.

21752502229 is a deficient number, since it is larger than the sum of its proper divisors (1).

21752502229 is an equidigital number, since it uses as much as digits as its factorization.

21752502229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 21752502229 in words is "twenty-one billion, seven hundred fifty-two million, five hundred two thousand, two hundred twenty-nine".