10221667 has 4 divisors (see below), whose sum is σ = 10231936. Its totient is φ = 10211400.

The previous prime is 10221649. The next prime is 10221671. The reversal of 10221667 is 76612201.

10221667 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10221667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10221647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3459 + ... + 5692.

It is an arithmetic number, because the mean of its divisors is an integer number (2557984).

Almost surely, 2^10221667 is an apocalyptic number.

10221667 is a deficient number, since it is larger than the sum of its proper divisors (10269).

10221667 is an equidigital number, since it uses as much as digits as its factorization.

10221667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10268.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 10221667 is about 3197.1341854855. The cubic root of 10221667 is about 217.0237396781.

Adding to 10221667 its reverse (76612201), we get a palindrome (86833868).

The spelling of 10221667 in words is "ten million, two hundred twenty-one thousand, six hundred sixty-seven".