25433115254221 has 2 divisors, whose sum is σ = 25433115254222. Its totient is φ = 25433115254220.

The previous prime is 25433115254171. The next prime is 25433115254243. The reversal of 25433115254221 is 12245251133452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16644196872900 + 8788918381321 = 4079730^2 + 2964611^2 .

It is a cyclic number.

It is not a de Polignac number, because 25433115254221 - 2⁹ = 25433115253709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25433115254251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12716557627110 + 12716557627111.

It is an arithmetic number, because the mean of its divisors is an integer number (12716557627111).

Almost surely, 2^{25433115254221} is an apocalyptic number.

It is an amenable number.

25433115254221 is a deficient number, since it is larger than the sum of its proper divisors (1).

25433115254221 is an equidigital number, since it uses as much as digits as its factorization.

25433115254221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288000, while the sum is 40.

Adding to 25433115254221 its reverse (12245251133452), we get a palindrome (37678366387673).

The spelling of 25433115254221 in words is "twenty-five trillion, four hundred thirty-three billion, one hundred fifteen million, two hundred fifty-four thousand, two hundred twenty-one".