3105221 has 4 divisors (see below), whose sum is σ = 3548832. Its totient is φ = 2661612.

The previous prime is 3105211. The next prime is 3105251. The reversal of 3105221 is 1225013.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3105221 - 2¹⁰ = 3104197 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3105196 and 3105205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3105211) 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, 221795 + ... + 221808.

It is an arithmetic number, because the mean of its divisors is an integer number (887208).

Almost surely, 2^3105221 is an apocalyptic number.

It is an amenable number.

3105221 is a deficient number, since it is larger than the sum of its proper divisors (443611).

3105221 is an equidigital number, since it uses as much as digits as its factorization.

3105221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443610.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 3105221 is about 1762.1637267859. The cubic root of 3105221 is about 145.8917850766.

The spelling of 3105221 in words is "three million, one hundred five thousand, two hundred twenty-one".