2251689 has 12 divisors (see below), whose sum is σ = 3300528. Its totient is φ = 1364440.

The previous prime is 2251687. The next prime is 2251703. The reversal of 2251689 is 9861522.

2251689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2251689 - 2¹ = 2251687 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

2251689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2251681) 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 11 ways as a sum of consecutive naturals, for example, 2739 + ... + 3464.

It is an arithmetic number, because the mean of its divisors is an integer number (275044).

2^2251689 is an apocalyptic number.

It is an amenable number.

2251689 is a deficient number, since it is larger than the sum of its proper divisors (1048839).

2251689 is a wasteful number, since it uses less digits than its factorization.

2251689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6228 (or 6217 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 2251689 is about 1500.5628943833. The cubic root of 2251689 is about 131.0698498963.

The spelling of 2251689 in words is "two million, two hundred fifty-one thousand, six hundred eighty-nine".