983213221 has 2 divisors, whose sum is σ = 983213222. Its totient is φ = 983213220.

The previous prime is 983213213. The next prime is 983213227. The reversal of 983213221 is 122312389.

983213221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 624300196 + 358913025 = 24986^2 + 18945^2 .

It is a cyclic number.

It is not a de Polignac number, because 983213221 - 2³ = 983213213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (983213227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491606610 + 491606611.

It is an arithmetic number, because the mean of its divisors is an integer number (491606611).

Almost surely, 2^983213221 is an apocalyptic number.

It is an amenable number.

983213221 is a deficient number, since it is larger than the sum of its proper divisors (1).

983213221 is an equidigital number, since it uses as much as digits as its factorization.

983213221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 983213221 is about 31356.2309756769. The cubic root of 983213221 is about 994.3728010275.

The spelling of 983213221 in words is "nine hundred eighty-three million, two hundred thirteen thousand, two hundred twenty-one".