25122652221017 has 16 divisors (see below), whose sum is σ = 27901243359360. Its totient is φ = 22476001497600.

The previous prime is 25122652220909. The next prime is 25122652221019. The reversal of 25122652221017 is 71012225622152.

It is a cyclic number.

It is not a de Polignac number, because 25122652221017 - 2²⁰ = 25122651172441 is a prime.

It is a super-2 number, since 2×25122652221017² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25122652221019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230610584 + ... + 230719497.

It is an arithmetic number, because the mean of its divisors is an integer number (1743827709960).

Almost surely, 2^{25122652221017} is an apocalyptic number.

It is an amenable number.

25122652221017 is a deficient number, since it is larger than the sum of its proper divisors (2778591138343).

25122652221017 is a wasteful number, since it uses less digits than its factorization.

25122652221017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461330224.

The product of its (nonzero) digits is 67200, while the sum is 38.

Adding to 25122652221017 its reverse (71012225622152), we get a palindrome (96134877843169).

The spelling of 25122652221017 in words is "twenty-five trillion, one hundred twenty-two billion, six hundred fifty-two million, two hundred twenty-one thousand, seventeen".