2183021 has 4 divisors (see below), whose sum is σ = 2311452. Its totient is φ = 2054592.

The previous prime is 2182997. The next prime is 2183029. The reversal of 2183021 is 1203812.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1590121 + 592900 = 1261^2 + 770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2183021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 128413 = 2183021 / (2 + 1 + 8 + 3 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2183029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64190 + ... + 64223.

It is an arithmetic number, because the mean of its divisors is an integer number (577863).

2^2183021 is an apocalyptic number.

It is an amenable number.

2183021 is a deficient number, since it is larger than the sum of its proper divisors (128431).

2183021 is a wasteful number, since it uses less digits than its factorization.

2183021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128430.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2183021 is about 1477.5049915313. The cubic root of 2183021 is about 129.7236932224.

Adding to 2183021 its reverse (1203812), we get a palindrome (3386833).

The spelling of 2183021 in words is "two million, one hundred eighty-three thousand, twenty-one".