2556019 has 2 divisors, whose sum is σ = 2556020. Its totient is φ = 2556018.

The previous prime is 2556011. The next prime is 2556023. The reversal of 2556019 is 9106552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2556019 - 2³ = 2556011 is a prime.

It is a super-2 number, since 2×2556019² = 13066466256722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2556011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278009 + 1278010.

It is an arithmetic number, because the mean of its divisors is an integer number (1278010).

2^2556019 is an apocalyptic number.

2556019 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556019 is an equidigital number, since it uses as much as digits as its factorization.

2556019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 2556019 is about 1598.7554534700. The cubic root of 2556019 is about 136.7271283802.

The spelling of 2556019 in words is "two million, five hundred fifty-six thousand, nineteen".