3113221 has 2 divisors, whose sum is σ = 3113222. Its totient is φ = 3113220.

The previous prime is 3113213. The next prime is 3113239. The reversal of 3113221 is 1223113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3101121 + 12100 = 1761^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 3113221 - 2³ = 3113213 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3113281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1556610 + 1556611.

It is an arithmetic number, because the mean of its divisors is an integer number (1556611).

Almost surely, 2^3113221 is an apocalyptic number.

It is an amenable number.

3113221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3113221 is an equidigital number, since it uses as much as digits as its factorization.

3113221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36, while the sum is 13.

The square root of 3113221 is about 1764.4322032881. The cubic root of 3113221 is about 146.0169649392.

Adding to 3113221 its reverse (1223113), we get a palindrome (4336334).

The spelling of 3113221 in words is "three million, one hundred thirteen thousand, two hundred twenty-one".