3220425 has 48 divisors (see below), whose sum is σ = 6388480. Its totient is φ = 1581120.

The previous prime is 3220423. The next prime is 3220433. The reversal of 3220425 is 5240223.

It is not a de Polignac number, because 3220425 - 2¹ = 3220423 is a prime.

It is a super-2 number, since 2×3220425² = 20742274361250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3220398 and 3220407.

It is not an unprimeable number, because it can be changed into a prime (3220423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8592 + ... + 8958.

Almost surely, 2^3220425 is an apocalyptic number.

It is an amenable number.

3220425 is a deficient number, since it is larger than the sum of its proper divisors (3168055).

3220425 is a wasteful number, since it uses less digits than its factorization.

3220425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 3220425 is about 1794.5542622055. The cubic root of 3220425 is about 147.6741216715.

Adding to 3220425 its reverse (5240223), we get a palindrome (8460648).

The spelling of 3220425 in words is "three million, two hundred twenty thousand, four hundred twenty-five".