22006651 has 4 divisors (see below), whose sum is σ = 22038400. Its totient is φ = 21974904.

The previous prime is 22006639. The next prime is 22006657. The reversal of 22006651 is 15660022.

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

It is a cyclic number.

It is not a de Polignac number, because 22006651 - 2¹⁵ = 21973883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22006657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14811 + ... + 16228.

It is an arithmetic number, because the mean of its divisors is an integer number (5509600).

Almost surely, 2^22006651 is an apocalyptic number.

22006651 is a deficient number, since it is larger than the sum of its proper divisors (31749).

22006651 is an equidigital number, since it uses as much as digits as its factorization.

22006651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31748.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 22006651 is about 4691.1247052279. The cubic root of 22006651 is about 280.2321671350.

Adding to 22006651 its reverse (15660022), we get a palindrome (37666673).

The spelling of 22006651 in words is "twenty-two million, six thousand, six hundred fifty-one".