2256551 has 4 divisors (see below), whose sum is σ = 2461704. Its totient is φ = 2051400.

The previous prime is 2256539. The next prime is 2256557. The reversal of 2256551 is 1556522.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2256551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2256551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102560 + ... + 102581.

It is an arithmetic number, because the mean of its divisors is an integer number (615426).

2^2256551 is an apocalyptic number.

2256551 is a deficient number, since it is larger than the sum of its proper divisors (205153).

2256551 is a wasteful number, since it uses less digits than its factorization.

2256551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205152.

The product of its digits is 3000, while the sum is 26.

The square root of 2256551 is about 1502.1820795097. The cubic root of 2256551 is about 131.1641203878.

It can be divided in two parts, 225 and 6551, that added together give a palindrome (6776).

The spelling of 2256551 in words is "two million, two hundred fifty-six thousand, five hundred fifty-one".