8221455 has 48 divisors (see below), whose sum is σ = 16477344. Its totient is φ = 3747840.

The previous prime is 8221453. The next prime is 8221463. The reversal of 8221455 is 5541228.

It is a happy number.

It is not a de Polignac number, because 8221455 - 2¹ = 8221453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221453) 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, 7927 + ... + 8903.

It is an arithmetic number, because the mean of its divisors is an integer number (343278).

Almost surely, 2^8221455 is an apocalyptic number.

8221455 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

8221455 is an abundant number, since it is smaller than the sum of its proper divisors (8255889).

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

8221455 is a wasteful number, since it uses less digits than its factorization.

8221455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016 (or 1013 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 8221455 is about 2867.3079709023. The cubic root of 8221455 is about 201.8286868937.

The spelling of 8221455 in words is "eight million, two hundred twenty-one thousand, four hundred fifty-five".