521326241 has 4 divisors (see below), whose sum is σ = 521934000. Its totient is φ = 520718484.

The previous prime is 521326231. The next prime is 521326271. The reversal of 521326241 is 142623125.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 521326241 - 2¹⁸ = 521064097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 521326241.

It is not an unprimeable number, because it can be changed into a prime (521326231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302591 + ... + 304308.

It is an arithmetic number, because the mean of its divisors is an integer number (130483500).

Almost surely, 2^521326241 is an apocalyptic number.

It is an amenable number.

521326241 is a deficient number, since it is larger than the sum of its proper divisors (607759).

521326241 is an equidigital number, since it uses as much as digits as its factorization.

521326241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607758.

The product of its digits is 2880, while the sum is 26.

The square root of 521326241 is about 22832.5697414899. The cubic root of 521326241 is about 804.8282189429.

Adding to 521326241 its reverse (142623125), we get a palindrome (663949366).

The spelling of 521326241 in words is "five hundred twenty-one million, three hundred twenty-six thousand, two hundred forty-one".