2505144421 has 4 divisors (see below), whose sum is σ = 2697847852. Its totient is φ = 2312440992.

The previous prime is 2505144419. The next prime is 2505144427. The reversal of 2505144421 is 1244415052.

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 304502500 + 2200641921 = 17450^2 + 46911^2 .

It is a cyclic number.

It is not a de Polignac number, because 2505144421 - 2¹ = 2505144419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2505144421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505144427) 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, 96351696 + ... + 96351721.

It is an arithmetic number, because the mean of its divisors is an integer number (674461963).

Almost surely, 2^2505144421 is an apocalyptic number.

It is an amenable number.

2505144421 is a deficient number, since it is larger than the sum of its proper divisors (192703431).

2505144421 is a wasteful number, since it uses less digits than its factorization.

2505144421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192703430.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 2505144421 is about 50051.4177721271. The cubic root of 2505144421 is about 1358.1391109391.

Adding to 2505144421 its reverse (1244415052), we get a palindrome (3749559473).

The spelling of 2505144421 in words is "two billion, five hundred five million, one hundred forty-four thousand, four hundred twenty-one".