25220450005 has 4 divisors (see below), whose sum is σ = 30264540012. Its totient is φ = 20176360000.

The previous prime is 25220449979. The next prime is 25220450023. The reversal of 25220450005 is 50005402252.

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 12010625649 + 13209824356 = 109593^2 + 114934^2 .

It is not a de Polignac number, because 25220450005 - 2²³ = 25212061397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2522044996 + ... + 2522045005.

It is an arithmetic number, because the mean of its divisors is an integer number (7566135003).

Almost surely, 2^25220450005 is an apocalyptic number.

It is an amenable number.

25220450005 is a deficient number, since it is larger than the sum of its proper divisors (5044090007).

25220450005 is an equidigital number, since it uses as much as digits as its factorization.

25220450005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5044090006.

The product of its (nonzero) digits is 4000, while the sum is 25.

Adding to 25220450005 its reverse (50005402252), we get a palindrome (75225852257).

The spelling of 25220450005 in words is "twenty-five billion, two hundred twenty million, four hundred fifty thousand, five".