2551111 has 4 divisors (see below), whose sum is σ = 2685400. Its totient is φ = 2416824.

The previous prime is 2551103. The next prime is 2551123. The reversal of 2551111 is 1111552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2551111 - 2³ = 2551103 is a prime.

It is a Duffinian number.

2551111 is a modest number, since divided by 1111 gives 255 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67116 + ... + 67153.

It is an arithmetic number, because the mean of its divisors is an integer number (671350).

2^2551111 is an apocalyptic number.

2551111 is a deficient number, since it is larger than the sum of its proper divisors (134289).

2551111 is a wasteful number, since it uses less digits than its factorization.

2551111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134288.

The product of its digits is 50, while the sum is 16.

The square root of 2551111 is about 1597.2197719788. The cubic root of 2551111 is about 136.6395590363.

Adding to 2551111 its reverse (1111552), we get a palindrome (3662663).

It can be divided in two parts, 2551 and 111, that added together give a palindrome (2662).

The spelling of 2551111 in words is "two million, five hundred fifty-one thousand, one hundred eleven".