265202221 has 2 divisors, whose sum is σ = 265202222. Its totient is φ = 265202220.

The previous prime is 265202219. The next prime is 265202243. The reversal of 265202221 is 122202562.

It is a happy number.

It is an a-pointer prime, because the next prime (265202243) can be obtained adding 265202221 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200222500 + 64979721 = 14150^2 + 8061^2 .

It is a cyclic number.

It is not a de Polignac number, because 265202221 - 2¹ = 265202219 is a prime.

Together with 265202219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 265202192 and 265202201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265202251) 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, 132601110 + 132601111.

It is an arithmetic number, because the mean of its divisors is an integer number (132601111).

Almost surely, 2^265202221 is an apocalyptic number.

It is an amenable number.

265202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

265202221 is an equidigital number, since it uses as much as digits as its factorization.

265202221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 265202221 is about 16285.0305802599. The cubic root of 265202221 is about 642.4791706470.

Adding to 265202221 its reverse (122202562), we get a palindrome (387404783).

The spelling of 265202221 in words is "two hundred sixty-five million, two hundred two thousand, two hundred twenty-one".