25235021417 has 2 divisors, whose sum is σ = 25235021418. Its totient is φ = 25235021416.

The previous prime is 25235021377. The next prime is 25235021467. The reversal of 25235021417 is 71412053252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25208230441 + 26790976 = 158771^2 + 5176^2 .

It is a cyclic number.

It is not a de Polignac number, because 25235021417 - 2²⁴ = 25218244201 is a prime.

It is not a weakly prime, because it can be changed into another prime (25235021467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12617510708 + 12617510709.

It is an arithmetic number, because the mean of its divisors is an integer number (12617510709).

Almost surely, 2^25235021417 is an apocalyptic number.

It is an amenable number.

25235021417 is a deficient number, since it is larger than the sum of its proper divisors (1).

25235021417 is an equidigital number, since it uses as much as digits as its factorization.

25235021417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 32.

Adding to 25235021417 its reverse (71412053252), we get a palindrome (96647074669).

The spelling of 25235021417 in words is "twenty-five billion, two hundred thirty-five million, twenty-one thousand, four hundred seventeen".