3106221 has 8 divisors (see below), whose sum is σ = 4169664. Its totient is φ = 2056800.

The previous prime is 3106199. The next prime is 3106237. The reversal of 3106221 is 1226013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3106221 - 2⁶ = 3106157 is a prime.

It is an Ulam number.

3106221 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3106221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3106021) 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, 2976 + ... + 3881.

It is an arithmetic number, because the mean of its divisors is an integer number (521208).

Almost surely, 2^3106221 is an apocalyptic number.

It is an amenable number.

3106221 is a deficient number, since it is larger than the sum of its proper divisors (1063443).

3106221 is a wasteful number, since it uses less digits than its factorization.

3106221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7011.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 3106221 is about 1762.4474460250. The cubic root of 3106221 is about 145.9074443085.

The spelling of 3106221 in words is "three million, one hundred six thousand, two hundred twenty-one".