8212281 has 32 divisors (see below), whose sum is σ = 13867008. Its totient is φ = 4199040.

The previous prime is 8212277. The next prime is 8212283. The reversal of 8212281 is 1822128.

It is not a de Polignac number, because 8212281 - 2² = 8212277 is a prime.

It is a super-2 number, since 2×8212281² = 134883118445922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8212283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16620 + ... + 17106.

It is an arithmetic number, because the mean of its divisors is an integer number (433344).

Almost surely, 2^8212281 is an apocalyptic number.

It is an amenable number.

8212281 is a deficient number, since it is larger than the sum of its proper divisors (5654727).

8212281 is a wasteful number, since it uses less digits than its factorization.

8212281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581.

The product of its digits is 512, while the sum is 24.

The square root of 8212281 is about 2865.7077659803. The cubic root of 8212281 is about 201.7535880415.

The spelling of 8212281 in words is "eight million, two hundred twelve thousand, two hundred eighty-one".