2551423121 has 8 divisors (see below), whose sum is σ = 2909315304. Its totient is φ = 2216620800.

The previous prime is 2551423111. The next prime is 2551423123. The reversal of 2551423121 is 1213241552.

It can be written as a sum of positive squares in 4 ways, for example, as 555120721 + 1996302400 = 23561^2 + 44680^2 .

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 2551423121 - 2²⁶ = 2484314257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2551423123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5772230 + ... + 5772671.

It is an arithmetic number, because the mean of its divisors is an integer number (363664413).

Almost surely, 2^2551423121 is an apocalyptic number.

It is an amenable number.

2551423121 is a deficient number, since it is larger than the sum of its proper divisors (357892183).

2551423121 is a wasteful number, since it uses less digits than its factorization.

2551423121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11544931.

The product of its digits is 2400, while the sum is 26.

The square root of 2551423121 is about 50511.6137239744. The cubic root of 2551423121 is about 1366.4513129309.

Adding to 2551423121 its reverse (1213241552), we get a palindrome (3764664673).

The spelling of 2551423121 in words is "two billion, five hundred fifty-one million, four hundred twenty-three thousand, one hundred twenty-one".