523554222323021 has 2 divisors, whose sum is σ = 523554222323022. Its totient is φ = 523554222323020.

The previous prime is 523554222322991. The next prime is 523554222323107. The reversal of 523554222323021 is 120323222455325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 412563572578921 + 110990649744100 = 20311661^2 + 10535210^2 .

It is a cyclic number.

It is not a de Polignac number, because 523554222323021 - 2³⁴ = 523537042453837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 523554222323021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523554222323221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261777111161510 + 261777111161511.

It is an arithmetic number, because the mean of its divisors is an integer number (261777111161511).

Almost surely, 2^{523554222323021} is an apocalyptic number.

It is an amenable number.

523554222323021 is a deficient number, since it is larger than the sum of its proper divisors (1).

523554222323021 is an equidigital number, since it uses as much as digits as its factorization.

523554222323021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864000, while the sum is 41.

Adding to 523554222323021 its reverse (120323222455325), we get a palindrome (643877444778346).

The spelling of 523554222323021 in words is "five hundred twenty-three trillion, five hundred fifty-four billion, two hundred twenty-two million, three hundred twenty-three thousand, twenty-one".