3221000 has 32 divisors (see below), whose sum is σ = 7539480. Its totient is φ = 1288000.

The previous prime is 3220967. The next prime is 3221017. The reversal of 3221000 is 1223.

It can be written as a sum of positive squares in 4 ways, for example, as 1387684 + 1833316 = 1178^2 + 1354^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611 + ... + 2610.

Almost surely, 2^3221000 is an apocalyptic number.

It is an amenable number.

3221000 is an abundant number, since it is smaller than the sum of its proper divisors (4318480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3221000 is a wasteful number, since it uses less digits than its factorization.

3221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242 (or 3228 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 3221000 is about 1794.7144619688. The cubic root of 3221000 is about 147.6829101147.

Adding to 3221000 its reverse (1223), we get a palindrome (3222223).

The spelling of 3221000 in words is "three million, two hundred twenty-one thousand".