2251656 has 48 divisors (see below), whose sum is σ = 6654960. Its totient is φ = 682080.

The previous prime is 2251649. The next prime is 2251673. The reversal of 2251656 is 6561522.

2251656 is a `hidden beast` number, since 2 + 2 + 5 + 1 + 656 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 630 + ... + 2213.

It is an arithmetic number, because the mean of its divisors is an integer number (138645).

2^2251656 is an apocalyptic number.

It is an amenable number.

2251656 is an abundant number, since it is smaller than the sum of its proper divisors (4403304).

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

2251656 is a wasteful number, since it uses less digits than its factorization.

2251656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2866 (or 2859 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 2251656 is about 1500.5518984694. The cubic root of 2251656 is about 131.0692095879.

It can be divided in two parts, 225 and 1656, that added together give a palindrome (1881).

The spelling of 2251656 in words is "two million, two hundred fifty-one thousand, six hundred fifty-six".