2556522 has 40 divisors (see below), whose sum is σ = 5877696. Its totient is φ = 830088.

The previous prime is 2556509. The next prime is 2556523. The reversal of 2556522 is 2256552.

2556522 is a `hidden beast` number, since 2 + 5 + 5 + 652 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2556523) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6783 + ... + 7149.

2^2556522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2556522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2938848).

2556522 is an abundant number, since it is smaller than the sum of its proper divisors (3321174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2556522 is a wasteful number, since it uses less digits than its factorization.

2556522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 415 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 2556522 is about 1598.9127555936. The cubic root of 2556522 is about 136.7360966540.

The spelling of 2556522 in words is "two million, five hundred fifty-six thousand, five hundred twenty-two".