1983221 has 8 divisors (see below), whose sum is σ = 2086080. Its totient is φ = 1885356.

The previous prime is 1983197. The next prime is 1983227. The reversal of 1983221 is 1223891.

It is a de Polignac number, because none of the positive numbers 2^k-1983221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12086 + ... + 12248.

It is an arithmetic number, because the mean of its divisors is an integer number (260760).

2^1983221 is an apocalyptic number.

It is an amenable number.

1983221 is a deficient number, since it is larger than the sum of its proper divisors (102859).

1983221 is an frugal number, since it uses more digits than its factorization.

1983221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 186 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 1983221 is about 1408.2687953654. The cubic root of 1983221 is about 125.6387781395.

The spelling of 1983221 in words is "one million, nine hundred eighty-three thousand, two hundred twenty-one".