2425544221 has 4 divisors (see below), whose sum is σ = 2466655200. Its totient is φ = 2384433244.

The previous prime is 2425544201. The next prime is 2425544249. The reversal of 2425544221 is 1224455242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2425544221 - 2¹¹ = 2425542173 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 (2425544201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20555401 + ... + 20555518.

It is an arithmetic number, because the mean of its divisors is an integer number (616663800).

Almost surely, 2^2425544221 is an apocalyptic number.

It is an amenable number.

2425544221 is a deficient number, since it is larger than the sum of its proper divisors (41110979).

2425544221 is an equidigital number, since it uses as much as digits as its factorization.

2425544221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41110978.

The product of its digits is 25600, while the sum is 31.

The square root of 2425544221 is about 49249.8144260463. The cubic root of 2425544221 is about 1343.5991866626.

Adding to 2425544221 its reverse (1224455242), we get a palindrome (3649999463).

The spelling of 2425544221 in words is "two billion, four hundred twenty-five million, five hundred forty-four thousand, two hundred twenty-one".