25090236217 has 2 divisors, whose sum is σ = 25090236218. Its totient is φ = 25090236216.

The previous prime is 25090236173. The next prime is 25090236247. The reversal of 25090236217 is 71263209052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24080522041 + 1009714176 = 155179^2 + 31776^2 .

It is a cyclic number.

It is not a de Polignac number, because 25090236217 - 2⁷ = 25090236089 is a prime.

It is not a weakly prime, because it can be changed into another prime (25090236247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12545118108 + 12545118109.

It is an arithmetic number, because the mean of its divisors is an integer number (12545118109).

Almost surely, 2^25090236217 is an apocalyptic number.

It is an amenable number.

25090236217 is a deficient number, since it is larger than the sum of its proper divisors (1).

25090236217 is an equidigital number, since it uses as much as digits as its factorization.

25090236217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 25090236217 in words is "twenty-five billion, ninety million, two hundred thirty-six thousand, two hundred seventeen".