2551044421 has 8 divisors (see below), whose sum is σ = 2639599200. Its totient is φ = 2462528880.

The previous prime is 2551044407. The next prime is 2551044449. The reversal of 2551044421 is 1244401552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2551044421 - 2¹⁷ = 2550913349 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 2551044421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551044401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195850 + ... + 208468.

It is an arithmetic number, because the mean of its divisors is an integer number (329949900).

Almost surely, 2^2551044421 is an apocalyptic number.

It is an amenable number.

2551044421 is a deficient number, since it is larger than the sum of its proper divisors (88554779).

2551044421 is a wasteful number, since it uses less digits than its factorization.

2551044421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19619.

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

The square root of 2551044421 is about 50507.8649420068. The cubic root of 2551044421 is about 1366.3837035103.

Adding to 2551044421 its reverse (1244401552), we get a palindrome (3795445973).

The spelling of 2551044421 in words is "two billion, five hundred fifty-one million, forty-four thousand, four hundred twenty-one".