2556226 has 4 divisors (see below), whose sum is σ = 3834342. Its totient is φ = 1278112.

The previous prime is 2556217. The next prime is 2556233. The reversal of 2556226 is 6226552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1825201 + 731025 = 1351^2 + 855^2 .

It is a d-powerful number, because it can be written as 2⁸ + 5⁷ + 5⁹ + 6³ + 2¹⁸ + 2¹⁸ + 6³ .

It is a junction number, because it is equal to n+sod(n) for n = 2556194 and 2556203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639055 + ... + 639058.

2^2556226 is an apocalyptic number.

2556226 is a deficient number, since it is larger than the sum of its proper divisors (1278116).

2556226 is a wasteful number, since it uses less digits than its factorization.

2556226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278115.

The product of its digits is 7200, while the sum is 28.

The square root of 2556226 is about 1598.8201900151. The cubic root of 2556226 is about 136.7308192436.

The spelling of 2556226 in words is "two million, five hundred fifty-six thousand, two hundred twenty-six".