2556523 has 2 divisors, whose sum is σ = 2556524. Its totient is φ = 2556522.

The previous prime is 2556509. The next prime is 2556559. The reversal of 2556523 is 3256552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2556523 - 2⁹ = 2556011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2556491 and 2556500.

It is not a weakly prime, because it can be changed into another prime (2556503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278261 + 1278262.

It is an arithmetic number, because the mean of its divisors is an integer number (1278262).

2^2556523 is an apocalyptic number.

2556523 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556523 is an equidigital number, since it uses as much as digits as its factorization.

2556523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 28.

The square root of 2556523 is about 1598.9130683061. The cubic root of 2556523 is about 136.7361144824.

The spelling of 2556523 in words is "two million, five hundred fifty-six thousand, five hundred twenty-three".