2556533 has 8 divisors (see below), whose sum is σ = 2962368. Its totient is φ = 2160864.

The previous prime is 2556523. The next prime is 2556559. The reversal of 2556533 is 3356552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2556533 - 2⁸ = 2556277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2556496 and 2556505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1991 + ... + 3012.

It is an arithmetic number, because the mean of its divisors is an integer number (370296).

2^2556533 is an apocalyptic number.

It is an amenable number.

2556533 is a deficient number, since it is larger than the sum of its proper divisors (405835).

2556533 is an equidigital number, since it uses as much as digits as its factorization.

2556533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5083.

The product of its digits is 13500, while the sum is 29.

The square root of 2556533 is about 1598.9161954274. The cubic root of 2556533 is about 136.7362927661.

The spelling of 2556533 in words is "two million, five hundred fifty-six thousand, five hundred thirty-three".