2263821 has 32 divisors (see below), whose sum is σ = 3717120. Its totient is φ = 1197504.

The previous prime is 2263817. The next prime is 2263829. The reversal of 2263821 is 1283622.

It is not a de Polignac number, because 2263821 - 2² = 2263817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2263791 and 2263800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2263829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20715 + ... + 20823.

It is an arithmetic number, because the mean of its divisors is an integer number (116160).

2^2263821 is an apocalyptic number.

2263821 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2263821 is a deficient number, since it is larger than the sum of its proper divisors (1453299).

2263821 is a wasteful number, since it uses less digits than its factorization.

2263821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185.

The product of its digits is 1152, while the sum is 24.

The square root of 2263821 is about 1504.5999468297. The cubic root of 2263821 is about 131.3048278869.

The spelling of 2263821 in words is "two million, two hundred sixty-three thousand, eight hundred twenty-one".