2551115111 has 2 divisors, whose sum is σ = 2551115112. Its totient is φ = 2551115110.

The previous prime is 2551115107. The next prime is 2551115113. The reversal of 2551115111 is 1115111552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2551115111 - 2² = 2551115107 is a prime.

It is a Sophie Germain prime.

Together with 2551115113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2551115113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275557555 + 1275557556.

It is an arithmetic number, because the mean of its divisors is an integer number (1275557556).

Almost surely, 2^2551115111 is an apocalyptic number.

2551115111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551115111 is an equidigital number, since it uses as much as digits as its factorization.

2551115111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250, while the sum is 23.

The square root of 2551115111 is about 50508.5647291625. The cubic root of 2551115111 is about 1366.3963243243.

Adding to 2551115111 its reverse (1115111552), we get a palindrome (3666226663).

The spelling of 2551115111 in words is "two billion, five hundred fifty-one million, one hundred fifteen thousand, one hundred eleven".