3180221 has 4 divisors (see below), whose sum is σ = 3469344. Its totient is φ = 2891100.

The previous prime is 3180209. The next prime is 3180223. The reversal of 3180221 is 1220813.

3180221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3180221 - 2¹⁴ = 3163837 is a prime.

It is a super-2 number, since 2×3180221² = 20227611217682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3180221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3180223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144545 + ... + 144566.

It is an arithmetic number, because the mean of its divisors is an integer number (867336).

Almost surely, 2^3180221 is an apocalyptic number.

It is an amenable number.

3180221 is a deficient number, since it is larger than the sum of its proper divisors (289123).

3180221 is a wasteful number, since it uses less digits than its factorization.

3180221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289122.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 3180221 is about 1783.3174142592. The cubic root of 3180221 is about 147.0570220109.

The spelling of 3180221 in words is "three million, one hundred eighty thousand, two hundred twenty-one".