3220518 has 16 divisors (see below), whose sum is σ = 7361280. Its totient is φ = 920136.

The previous prime is 3220513. The next prime is 3220523. The reversal of 3220518 is 8150223.

It is an interprime number because it is at equal distance from previous prime (3220513) and next prime (3220523).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3220494 and 3220503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220513) 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, 38298 + ... + 38381.

It is an arithmetic number, because the mean of its divisors is an integer number (460080).

Almost surely, 2^3220518 is an apocalyptic number.

3220518 is an abundant number, since it is smaller than the sum of its proper divisors (4140762).

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

3220518 is a wasteful number, since it uses less digits than its factorization.

3220518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76691.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 3220518 is about 1794.5801737454. The cubic root of 3220518 is about 147.6755431776.

It can be divided in two parts, 32205 and 18, that added together give a palindrome (32223).

The spelling of 3220518 in words is "three million, two hundred twenty thousand, five hundred eighteen".