224420105521 has 2 divisors, whose sum is σ = 224420105522. Its totient is φ = 224420105520.

The previous prime is 224420105501. The next prime is 224420105549. The reversal of 224420105521 is 125501024422.

It is a happy number.

It is an a-pointer prime, because the next prime (224420105549) can be obtained adding 224420105521 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213679685025 + 10740420496 = 462255^2 + 103636^2 .

It is a cyclic number.

It is not a de Polignac number, because 224420105521 - 2³³ = 215830170929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 224420105521.

It is not a weakly prime, because it can be changed into another prime (224420105501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112210052760 + 112210052761.

It is an arithmetic number, because the mean of its divisors is an integer number (112210052761).

Almost surely, 2^224420105521 is an apocalyptic number.

It is an amenable number.

224420105521 is a deficient number, since it is larger than the sum of its proper divisors (1).

224420105521 is an equidigital number, since it uses as much as digits as its factorization.

224420105521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 224420105521 its reverse (125501024422), we get a palindrome (349921129943).

The spelling of 224420105521 in words is "two hundred twenty-four billion, four hundred twenty million, one hundred five thousand, five hundred twenty-one".