25588904221 has 2 divisors, whose sum is σ = 25588904222. Its totient is φ = 25588904220.

The previous prime is 25588904197. The next prime is 25588904249. The reversal of 25588904221 is 12240988552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13491984025 + 12096920196 = 116155^2 + 109986^2 .

It is a cyclic number.

It is not a de Polignac number, because 25588904221 - 2¹⁵ = 25588871453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25588904281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12794452110 + 12794452111.

It is an arithmetic number, because the mean of its divisors is an integer number (12794452111).

Almost surely, 2^25588904221 is an apocalyptic number.

It is an amenable number.

25588904221 is a deficient number, since it is larger than the sum of its proper divisors (1).

25588904221 is an equidigital number, since it uses as much as digits as its factorization.

25588904221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 25588904221 in words is "twenty-five billion, five hundred eighty-eight million, nine hundred four thousand, two hundred twenty-one".