2123822 has 4 divisors (see below), whose sum is σ = 3185736. Its totient is φ = 1061910.

The previous prime is 2123791. The next prime is 2123831. The reversal of 2123822 is 2283212.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2123794 and 2123803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530954 + ... + 530957.

It is an arithmetic number, because the mean of its divisors is an integer number (796434).

2^2123822 is an apocalyptic number.

2123822 is a deficient number, since it is larger than the sum of its proper divisors (1061914).

2123822 is a wasteful number, since it uses less digits than its factorization.

2123822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061913.

The product of its digits is 384, while the sum is 20.

The square root of 2123822 is about 1457.3338670325. Note that the first 3 decimals coincide. The cubic root of 2123822 is about 128.5403185165.

The spelling of 2123822 in words is "two million, one hundred twenty-three thousand, eight hundred twenty-two".