2251919 has 4 divisors (see below), whose sum is σ = 2254944. Its totient is φ = 2248896.

The previous prime is 2251913. The next prime is 2251927. The reversal of 2251919 is 9191522.

2251919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2251919 - 2⁴ = 2251903 is a prime.

It is a super-2 number, since 2×2251919² = 10142278365122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2251891 and 2251900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251913) 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 3 ways as a sum of consecutive naturals, for example, 479 + ... + 2175.

It is an arithmetic number, because the mean of its divisors is an integer number (563736).

2^2251919 is an apocalyptic number.

2251919 is a deficient number, since it is larger than the sum of its proper divisors (3025).

2251919 is a wasteful number, since it uses less digits than its factorization.

2251919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024.

The product of its digits is 1620, while the sum is 29.

The square root of 2251919 is about 1500.6395303337. The cubic root of 2251919 is about 131.0743124781.

The spelling of 2251919 in words is "two million, two hundred fifty-one thousand, nine hundred nineteen".