3221530 has 16 divisors (see below), whose sum is σ = 6245064. Its totient is φ = 1189440.

The previous prime is 3221513. The next prime is 3221539. The reversal of 3221530 is 351223.

It can be written as a sum of positive squares in 4 ways, for example, as 1798281 + 1423249 = 1341^2 + 1193^2 .

It is not an unprimeable number, because it can be changed into a prime (3221539) 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, 12261 + ... + 12520.

Almost surely, 2^3221530 is an apocalyptic number.

3221530 is a deficient number, since it is larger than the sum of its proper divisors (3023534).

3221530 is a wasteful number, since it uses less digits than its factorization.

3221530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24801.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 3221530 is about 1794.8621116955. The cubic root of 3221530 is about 147.6910098405.

Adding to 3221530 its reverse (351223), we get a palindrome (3572753).

The spelling of 3221530 in words is "three million, two hundred twenty-one thousand, five hundred thirty".