8221135 has 16 divisors (see below), whose sum is σ = 10765440. Its totient is φ = 5990400.

The previous prime is 8221111. The next prime is 8221139. The reversal of 8221135 is 5311228.

8221135 = 145² + 146² + ... + 302².

It is not a de Polignac number, because 8221135 - 2¹¹ = 8219087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221139) 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, 4335 + ... + 5935.

It is an arithmetic number, because the mean of its divisors is an integer number (672840).

Almost surely, 2^8221135 is an apocalyptic number.

8221135 is a deficient number, since it is larger than the sum of its proper divisors (2544305).

8221135 is a wasteful number, since it uses less digits than its factorization.

8221135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698.

The product of its digits is 480, while the sum is 22.

The square root of 8221135 is about 2867.2521688892. The cubic root of 8221135 is about 201.8260682973.

The spelling of 8221135 in words is "eight million, two hundred twenty-one thousand, one hundred thirty-five".