25502201001 has 16 divisors (see below), whose sum is σ = 37788931200. Its totient is φ = 16997915664.

The previous prime is 25502200951. The next prime is 25502201003. The reversal of 25502201001 is 10010220552.

It is not a de Polignac number, because 25502201001 - 2¹⁵ = 25502168233 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25502201003) 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, 36340 + ... + 228746.

It is an arithmetic number, because the mean of its divisors is an integer number (2361808200).

Almost surely, 2^25502201001 is an apocalyptic number.

It is an amenable number.

25502201001 is a deficient number, since it is larger than the sum of its proper divisors (12286730199).

25502201001 is a wasteful number, since it uses less digits than its factorization.

25502201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197325 (or 197319 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

Adding to 25502201001 its reverse (10010220552), we get a palindrome (35512421553).

The spelling of 25502201001 in words is "twenty-five billion, five hundred two million, two hundred one thousand, one".