2551121303 has 16 divisors (see below), whose sum is σ = 2719132416. Its totient is φ = 2385164160.

The previous prime is 2551121299. The next prime is 2551121351. The reversal of 2551121303 is 3031211552.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2551121303 - 2² = 2551121299 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 (2551121003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2337788 + ... + 2338878.

It is an arithmetic number, because the mean of its divisors is an integer number (169945776).

Almost surely, 2^2551121303 is an apocalyptic number.

2551121303 is a deficient number, since it is larger than the sum of its proper divisors (168011113).

2551121303 is a wasteful number, since it uses less digits than its factorization.

2551121303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 2551121303 is about 50508.6260256602. The cubic root of 2551121303 is about 1366.3974298173.

Adding to 2551121303 its reverse (3031211552), we get a palindrome (5582332855).

The spelling of 2551121303 in words is "two billion, five hundred fifty-one million, one hundred twenty-one thousand, three hundred three".