2551109 has 4 divisors (see below), whose sum is σ = 2783040. Its totient is φ = 2319180.

The previous prime is 2551103. The next prime is 2551123. The reversal of 2551109 is 9011552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2551109 - 2⁸ = 2550853 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115949 + ... + 115970.

It is an arithmetic number, because the mean of its divisors is an integer number (695760).

2^2551109 is an apocalyptic number.

It is an amenable number.

2551109 is a deficient number, since it is larger than the sum of its proper divisors (231931).

2551109 is a wasteful number, since it uses less digits than its factorization.

2551109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231930.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 2551109 is about 1597.2191458908. The cubic root of 2551109 is about 136.6395233291.

The spelling of 2551109 in words is "two million, five hundred fifty-one thousand, one hundred nine".