2551544421 has 8 divisors (see below), whose sum is σ = 3402547584. Its totient is φ = 1700785440.

The previous prime is 2551544419. The next prime is 2551544477. The reversal of 2551544421 is 1244451552.

It is a happy number.

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

It is not a de Polignac number, because 2551544421 - 2¹ = 2551544419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551544221) 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, 35085 + ... + 79586.

It is an arithmetic number, because the mean of its divisors is an integer number (425318448).

Almost surely, 2^2551544421 is an apocalyptic number.

It is an amenable number.

2551544421 is a deficient number, since it is larger than the sum of its proper divisors (851003163).

2551544421 is a wasteful number, since it uses less digits than its factorization.

2551544421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122091.

The product of its digits is 32000, while the sum is 33.

The square root of 2551544421 is about 50512.8144236688. The cubic root of 2551544421 is about 1366.4729672403.

Adding to 2551544421 its reverse (1244451552), we get a palindrome (3795995973).

The spelling of 2551544421 in words is "two billion, five hundred fifty-one million, five hundred forty-four thousand, four hundred twenty-one".