25223914057621 has 2 divisors, whose sum is σ = 25223914057622. Its totient is φ = 25223914057620.

The previous prime is 25223914057613. The next prime is 25223914057669. The reversal of 25223914057621 is 12675041932252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13260886402500 + 11963027655121 = 3641550^2 + 3458761^2 .

It is a cyclic number.

It is not a de Polignac number, because 25223914057621 - 2³ = 25223914057613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25223914057721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12611957028810 + 12611957028811.

It is an arithmetic number, because the mean of its divisors is an integer number (12611957028811).

Almost surely, 2^{25223914057621} is an apocalyptic number.

It is an amenable number.

25223914057621 is a deficient number, since it is larger than the sum of its proper divisors (1).

25223914057621 is an equidigital number, since it uses as much as digits as its factorization.

25223914057621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 49.

Adding to 25223914057621 its reverse (12675041932252), we get a palindrome (37898955989873).

The spelling of 25223914057621 in words is "twenty-five trillion, two hundred twenty-three billion, nine hundred fourteen million, fifty-seven thousand, six hundred twenty-one".