3221455 has 4 divisors (see below), whose sum is σ = 3865752. Its totient is φ = 2577160.

The previous prime is 3221453. The next prime is 3221473. The reversal of 3221455 is 5541223.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5541223 = 193 ⋅28711.

It is not a de Polignac number, because 3221455 - 2¹ = 3221453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322141 + ... + 322150.

It is an arithmetic number, because the mean of its divisors is an integer number (966438).

Almost surely, 2^3221455 is an apocalyptic number.

3221455 is a deficient number, since it is larger than the sum of its proper divisors (644297).

3221455 is an equidigital number, since it uses as much as digits as its factorization.

3221455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644296.

The product of its digits is 1200, while the sum is 22.

The square root of 3221455 is about 1794.8412186040. The cubic root of 3221455 is about 147.6898637068.

Adding to 3221455 its reverse (5541223), we get a palindrome (8762678).

The spelling of 3221455 in words is "three million, two hundred twenty-one thousand, four hundred fifty-five".