22161626 has 16 divisors (see below), whose sum is σ = 34719840. Its totient is φ = 10595760.

The previous prime is 22161617. The next prime is 22161647. The reversal of 22161626 is 62616122.

It is a super-2 number, since 2×22161626² = 982275333927752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22161595 and 22161604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4421 + ... + 7991.

It is an arithmetic number, because the mean of its divisors is an integer number (2169990).

Almost surely, 2^22161626 is an apocalyptic number.

22161626 is a deficient number, since it is larger than the sum of its proper divisors (12558214).

22161626 is a wasteful number, since it uses less digits than its factorization.

22161626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3709.

The product of its digits is 1728, while the sum is 26.

The square root of 22161626 is about 4707.6136205088. The cubic root of 22161626 is about 280.8884449735. Note that the first 3 decimals are identical.

Adding to 22161626 its reverse (62616122), we get a palindrome (84777748).

The spelling of 22161626 in words is "twenty-two million, one hundred sixty-one thousand, six hundred twenty-six".