22161706 has 16 divisors (see below), whose sum is σ = 38054016. Its totient is φ = 9482256.

The previous prime is 22161703. The next prime is 22161707. The reversal of 22161706 is 60716122.

It is a super-2 number, since 2×22161706² = 982282425660872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22161701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12720 + ... + 14356.

It is an arithmetic number, because the mean of its divisors is an integer number (2378376).

Almost surely, 2^22161706 is an apocalyptic number.

22161706 is a deficient number, since it is larger than the sum of its proper divisors (15892310).

22161706 is a wasteful number, since it uses less digits than its factorization.

22161706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2613.

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

The square root of 22161706 is about 4707.6221173752. The cubic root of 22161706 is about 280.8887829608. Note that the first 3 decimals are identical.

Adding to 22161706 its reverse (60716122), we get a palindrome (82877828).

The spelling of 22161706 in words is "twenty-two million, one hundred sixty-one thousand, seven hundred six".