2051856 has 30 divisors (see below), whose sum is σ = 5742750. Its totient is φ = 683904.

The previous prime is 2051851. The next prime is 2051887. The reversal of 2051856 is 6581502.

It can be written as a sum of positive squares in only one way, i.e., 1904400 + 147456 = 1380^2 + 384^2 .

It is a super-2 number, since 2×2051856² = 8420226089472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2051851) 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 5 ways as a sum of consecutive naturals, for example, 6981 + ... + 7268.

It is an arithmetic number, because the mean of its divisors is an integer number (191425).

2^2051856 is an apocalyptic number.

It is an amenable number.

2051856 is an abundant number, since it is smaller than the sum of its proper divisors (3690894).

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

2051856 is a wasteful number, since it uses less digits than its factorization.

2051856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14263 (or 14254 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 2051856 is about 1432.4301030068. The cubic root of 2051856 is about 127.0717349503.

The spelling of 2051856 in words is "two million, fifty-one thousand, eight hundred fifty-six".