2256919 has 4 divisors (see below), whose sum is σ = 2579344. Its totient is φ = 1934496.

The previous prime is 2256913. The next prime is 2256923. The reversal of 2256919 is 9196522.

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 2256919 - 2³ = 2256911 is a prime.

It is a super-2 number, since 2×2256919² = 10187366745122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256911) 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, 161202 + ... + 161215.

It is an arithmetic number, because the mean of its divisors is an integer number (644836).

2^2256919 is an apocalyptic number.

2256919 is a deficient number, since it is larger than the sum of its proper divisors (322425).

2256919 is an equidigital number, since it uses as much as digits as its factorization.

2256919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322424.

The product of its digits is 9720, while the sum is 34.

The square root of 2256919 is about 1502.3045629965. The cubic root of 2256919 is about 131.1712501141.

The spelling of 2256919 in words is "two million, two hundred fifty-six thousand, nine hundred nineteen".