264341221 has 2 divisors, whose sum is σ = 264341222. Its totient is φ = 264341220.

The previous prime is 264341219. The next prime is 264341267. The reversal of 264341221 is 122143462.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233937025 + 30404196 = 15295^2 + 5514^2 .

It is a cyclic number.

It is not a de Polignac number, because 264341221 - 2¹ = 264341219 is a prime.

It is a super-2 number, since 2×264341221² = 139752562239541682, which contains 22 as substring.

Together with 264341219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264341321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132170610 + 132170611.

It is an arithmetic number, because the mean of its divisors is an integer number (132170611).

Almost surely, 2^264341221 is an apocalyptic number.

It is an amenable number.

264341221 is a deficient number, since it is larger than the sum of its proper divisors (1).

264341221 is an equidigital number, since it uses as much as digits as its factorization.

264341221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

The square root of 264341221 is about 16258.5737689380. The cubic root of 264341221 is about 641.7831303605.

Adding to 264341221 its reverse (122143462), we get a palindrome (386484683).

The spelling of 264341221 in words is "two hundred sixty-four million, three hundred forty-one thousand, two hundred twenty-one".