22245532224521 has 2 divisors, whose sum is σ = 22245532224522. Its totient is φ = 22245532224520.

The previous prime is 22245532224499. The next prime is 22245532224551. The reversal of 22245532224521 is 12542223554222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22059357234121 + 186174990400 = 4696739^2 + 431480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22245532224521 is a prime.

It is not a weakly prime, because it can be changed into another prime (22245532224551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11122766112260 + 11122766112261.

It is an arithmetic number, because the mean of its divisors is an integer number (11122766112261).

Almost surely, 2^{22245532224521} is an apocalyptic number.

It is an amenable number.

22245532224521 is a deficient number, since it is larger than the sum of its proper divisors (1).

22245532224521 is an equidigital number, since it uses as much as digits as its factorization.

22245532224521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768000, while the sum is 41.

Adding to 22245532224521 its reverse (12542223554222), we get a palindrome (34787755778743).

The spelling of 22245532224521 in words is "twenty-two trillion, two hundred forty-five billion, five hundred thirty-two million, two hundred twenty-four thousand, five hundred twenty-one".