523034243521 has 4 divisors (see below), whose sum is σ = 531608575444. Its totient is φ = 514459911600.

The previous prime is 523034243489. The next prime is 523034243531. The reversal of 523034243521 is 125342430325.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44293411600 + 478740831921 = 210460^2 + 691911^2 .

It is a cyclic number.

It is not a de Polignac number, because 523034243521 - 2⁵ = 523034243489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523034243531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4287165870 + ... + 4287165991.

It is an arithmetic number, because the mean of its divisors is an integer number (132902143861).

Almost surely, 2^523034243521 is an apocalyptic number.

It is an amenable number.

523034243521 is a deficient number, since it is larger than the sum of its proper divisors (8574331923).

523034243521 is an equidigital number, since it uses as much as digits as its factorization.

523034243521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8574331922.

The product of its (nonzero) digits is 86400, while the sum is 34.

Adding to 523034243521 its reverse (125342430325), we get a palindrome (648376673846).

The spelling of 523034243521 in words is "five hundred twenty-three billion, thirty-four million, two hundred forty-three thousand, five hundred twenty-one".