3220455 has 16 divisors (see below), whose sum is σ = 5889024. Its totient is φ = 1472160.

The previous prime is 3220453. The next prime is 3220471. The reversal of 3220455 is 5540223.

It is not a de Polignac number, because 3220455 - 2¹ = 3220453 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15231 + ... + 15440.

It is an arithmetic number, because the mean of its divisors is an integer number (368064).

Almost surely, 2^3220455 is an apocalyptic number.

3220455 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3220455 is a deficient number, since it is larger than the sum of its proper divisors (2668569).

3220455 is a wasteful number, since it uses less digits than its factorization.

3220455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30686.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 3220455 is about 1794.5626208076. The cubic root of 3220455 is about 147.6745802249.

Adding to 3220455 its reverse (5540223), we get a palindrome (8760678).

The spelling of 3220455 in words is "three million, two hundred twenty thousand, four hundred fifty-five".