2051822 has 4 divisors (see below), whose sum is σ = 3077736. Its totient is φ = 1025910.

The previous prime is 2051821. The next prime is 2051839. The reversal of 2051822 is 2281502.

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

It is a junction number, because it is equal to n+sod(n) for n = 2051794 and 2051803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512954 + ... + 512957.

It is an arithmetic number, because the mean of its divisors is an integer number (769434).

2^2051822 is an apocalyptic number.

2051822 is a deficient number, since it is larger than the sum of its proper divisors (1025914).

2051822 is a wasteful number, since it uses less digits than its factorization.

2051822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025913.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2051822 is about 1432.4182350138. The cubic root of 2051822 is about 127.0710330715.

Subtracting from 2051822 its product of nonzero digits (320), we obtain a palindrome (2051502).

The spelling of 2051822 in words is "two million, fifty-one thousand, eight hundred twenty-two".