22161606 has 8 divisors (see below), whose sum is σ = 44323224. Its totient is φ = 7387200.

The previous prime is 22161599. The next prime is 22161617. The reversal of 22161606 is 60616122.

It is a sphenic number, since it is the product of 3 distinct primes.

22161606 is an admirable number.

It is a super-2 number, since 2×22161606² = 982273560998472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1846795 + ... + 1846806.

It is an arithmetic number, because the mean of its divisors is an integer number (5540403).

Almost surely, 2^22161606 is an apocalyptic number.

22161606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22161606 is a wasteful number, since it uses less digits than its factorization.

22161606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3693606.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 22161606 is about 4707.6114962898. The cubic root of 22161606 is about 280.8883604765. Note that the first 3 decimals are identical.

Adding to 22161606 its reverse (60616122), we get a palindrome (82777728).

The spelling of 22161606 in words is "twenty-two million, one hundred sixty-one thousand, six hundred six".