264325021 has 2 divisors, whose sum is σ = 264325022. Its totient is φ = 264325020.

The previous prime is 264325013. The next prime is 264325051. The reversal of 264325021 is 120523462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147987225 + 116337796 = 12165^2 + 10786^2 .

It is a cyclic number.

It is not a de Polignac number, because 264325021 - 2³ = 264325013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264325051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132162510 + 132162511.

It is an arithmetic number, because the mean of its divisors is an integer number (132162511).

Almost surely, 2^264325021 is an apocalyptic number.

It is an amenable number.

264325021 is a deficient number, since it is larger than the sum of its proper divisors (1).

264325021 is an equidigital number, since it uses as much as digits as its factorization.

264325021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 264325021 is about 16258.0755626243. The cubic root of 264325021 is about 641.7700196557.

Adding to 264325021 its reverse (120523462), we get a palindrome (384848483).

The spelling of 264325021 in words is "two hundred sixty-four million, three hundred twenty-five thousand, twenty-one".