264701221 has 2 divisors, whose sum is σ = 264701222. Its totient is φ = 264701220.

The previous prime is 264701197. The next prime is 264701309. The reversal of 264701221 is 122107462.

264701221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222308100 + 42393121 = 14910^2 + 6511^2 .

It is a cyclic number.

It is not a de Polignac number, because 264701221 - 2⁷ = 264701093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264701621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132350610 + 132350611.

It is an arithmetic number, because the mean of its divisors is an integer number (132350611).

Almost surely, 2^264701221 is an apocalyptic number.

It is an amenable number.

264701221 is a deficient number, since it is larger than the sum of its proper divisors (1).

264701221 is an equidigital number, since it uses as much as digits as its factorization.

264701221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 264701221 is about 16269.6410839330. The cubic root of 264701221 is about 642.0743412455.

Adding to 264701221 its reverse (122107462), we get a palindrome (386808683).

The spelling of 264701221 in words is "two hundred sixty-four million, seven hundred one thousand, two hundred twenty-one".