25332350221 has 2 divisors, whose sum is σ = 25332350222. Its totient is φ = 25332350220.

The previous prime is 25332350179. The next prime is 25332350227. The reversal of 25332350221 is 12205323352.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25325221321 + 7128900 = 159139^2 + 2670^2 .

It is a cyclic number.

It is not a de Polignac number, because 25332350221 - 2⁷ = 25332350093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25332350221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25332350227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12666175110 + 12666175111.

It is an arithmetic number, because the mean of its divisors is an integer number (12666175111).

Almost surely, 2^25332350221 is an apocalyptic number.

It is an amenable number.

25332350221 is a deficient number, since it is larger than the sum of its proper divisors (1).

25332350221 is an equidigital number, since it uses as much as digits as its factorization.

25332350221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 25332350221 its reverse (12205323352), we get a palindrome (37537673573).

The spelling of 25332350221 in words is "twenty-five billion, three hundred thirty-two million, three hundred fifty thousand, two hundred twenty-one".