25125252101 has 4 divisors (see below), whose sum is σ = 25127817132. Its totient is φ = 25122687072.

The previous prime is 25125252043. The next prime is 25125252149. The reversal of 25125252101 is 10125252152.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19530062500 + 5595189601 = 139750^2 + 74801^2 .

It is a cyclic number.

It is not a de Polignac number, because 25125252101 - 2¹⁰ = 25125251077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25125252181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1267766 + ... + 1287431.

It is an arithmetic number, because the mean of its divisors is an integer number (6281954283).

Almost surely, 2^25125252101 is an apocalyptic number.

It is an amenable number.

25125252101 is a deficient number, since it is larger than the sum of its proper divisors (2565031).

25125252101 is an equidigital number, since it uses as much as digits as its factorization.

25125252101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2565030.

The product of its (nonzero) digits is 2000, while the sum is 26.

The spelling of 25125252101 in words is "twenty-five billion, one hundred twenty-five million, two hundred fifty-two thousand, one hundred one".