25100140221 has 16 divisors (see below), whose sum is σ = 40045808320. Its totient is φ = 15446239920.

The previous prime is 25100140217. The next prime is 25100140231. The reversal of 25100140221 is 12204100152.

It is not a de Polignac number, because 25100140221 - 2² = 25100140217 is a prime.

It is a super-2 number, since 2×25100140221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25100140194 and 25100140203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25100140231) 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, 35754835 + ... + 35755536.

It is an arithmetic number, because the mean of its divisors is an integer number (2502863020).

Almost surely, 2^25100140221 is an apocalyptic number.

It is an amenable number.

25100140221 is a deficient number, since it is larger than the sum of its proper divisors (14945668099).

25100140221 is a wasteful number, since it uses less digits than its factorization.

25100140221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71510393 (or 71510387 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 25100140221 its reverse (12204100152), we get a palindrome (37304240373).

The spelling of 25100140221 in words is "twenty-five billion, one hundred million, one hundred forty thousand, two hundred twenty-one".