2051656 has 16 divisors (see below), whose sum is σ = 3863340. Its totient is φ = 1021440.

The previous prime is 2051653. The next prime is 2051671. The reversal of 2051656 is 6561502.

It can be written as a sum of positive squares in 2 ways, for example, as 1602756 + 448900 = 1266^2 + 670^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2051656.

It is not an unprimeable number, because it can be changed into a prime (2051653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2316 + ... + 3076.

2^2051656 is an apocalyptic number.

It is an amenable number.

2051656 is a deficient number, since it is larger than the sum of its proper divisors (1811684).

2051656 is a wasteful number, since it uses less digits than its factorization.

2051656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104 (or 1100 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 2051656 is about 1432.3602898712. The cubic root of 2051656 is about 127.0676061400.

The spelling of 2051656 in words is "two million, fifty-one thousand, six hundred fifty-six".