2256619 has 2 divisors, whose sum is σ = 2256620. Its totient is φ = 2256618.

The previous prime is 2256613. The next prime is 2256623. The reversal of 2256619 is 9166522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2256619 - 2¹⁹ = 1732331 is a prime.

It is a super-2 number, since 2×2256619² = 10184658622322, which contains 22 as substring.

It is a Chen prime.

2256619 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2256613) 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 as a sum of consecutive naturals, namely, 1128309 + 1128310.

It is an arithmetic number, because the mean of its divisors is an integer number (1128310).

2^2256619 is an apocalyptic number.

2256619 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256619 is an equidigital number, since it uses as much as digits as its factorization.

2256619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 2256619 is about 1502.2047130801. The cubic root of 2256619 is about 131.1654378956.

Subtracting 2256619 from its reverse (9166522), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 2256619 in words is "two million, two hundred fifty-six thousand, six hundred nineteen".