3116221 has 4 divisors (see below), whose sum is σ = 3125500. Its totient is φ = 3106944.

The previous prime is 3116207. The next prime is 3116227. The reversal of 3116221 is 1226113.

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 1028196 + 2088025 = 1014^2 + 1445^2 .

It is a cyclic number.

It is not a de Polignac number, because 3116221 - 2⁵ = 3116189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3116195 and 3116204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3116227) 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, 4116 + ... + 4813.

It is an arithmetic number, because the mean of its divisors is an integer number (781375).

Almost surely, 2^3116221 is an apocalyptic number.

It is an amenable number.

3116221 is a deficient number, since it is larger than the sum of its proper divisors (9279).

3116221 is an equidigital number, since it uses as much as digits as its factorization.

3116221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9278.

The product of its digits is 72, while the sum is 16.

The square root of 3116221 is about 1765.2821304256. The cubic root of 3116221 is about 146.0638520982.

The spelling of 3116221 in words is "three million, one hundred sixteen thousand, two hundred twenty-one".