3223521 has 24 divisors (see below), whose sum is σ = 5603520. Its totient is φ = 1744416.

The previous prime is 3223501. The next prime is 3223529. The reversal of 3223521 is 1253223.

It is not a de Polignac number, because 3223521 - 2⁹ = 3223009 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3223494 and 3223503.

It is not an unprimeable number, because it can be changed into a prime (3223529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150 + ... + 2543.

It is an arithmetic number, because the mean of its divisors is an integer number (233480).

Almost surely, 2^3223521 is an apocalyptic number.

It is an amenable number.

3223521 is a deficient number, since it is larger than the sum of its proper divisors (2379999).

3223521 is a wasteful number, since it uses less digits than its factorization.

3223521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725 (or 2722 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 3223521 is about 1795.4166647327. The cubic root of 3223521 is about 147.7214293661.

Multiplying 3223521 by its sum of digits (18), we get a triangular number (58023378 = T₁₀₇₇₂).

Adding to 3223521 its reverse (1253223), we get a palindrome (4476744).

The spelling of 3223521 in words is "three million, two hundred twenty-three thousand, five hundred twenty-one".