10221286 has 4 divisors (see below), whose sum is σ = 15331932. Its totient is φ = 5110642.

The previous prime is 10221283. The next prime is 10221293. The reversal of 10221286 is 68212201.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2555320 + ... + 2555323.

It is an arithmetic number, because the mean of its divisors is an integer number (3832983).

Almost surely, 2^10221286 is an apocalyptic number.

10221286 is a deficient number, since it is larger than the sum of its proper divisors (5110646).

10221286 is an equidigital number, since it uses as much as digits as its factorization.

10221286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5110645.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 10221286 is about 3197.0746003182. The cubic root of 10221286 is about 217.0210432140.

Adding to 10221286 its reverse (68212201), we get a palindrome (78433487).

The spelling of 10221286 in words is "ten million, two hundred twenty-one thousand, two hundred eighty-six".