22000172 has 12 divisors (see below), whose sum is σ = 38697120. Its totient is φ = 10943856.

The previous prime is 22000169. The next prime is 22000201. The reversal of 22000172 is 27100022.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13172 + ... + 14747.

It is an arithmetic number, because the mean of its divisors is an integer number (3224760).

Almost surely, 2^22000172 is an apocalyptic number.

It is an amenable number.

22000172 is a deficient number, since it is larger than the sum of its proper divisors (16696948).

22000172 is a wasteful number, since it uses less digits than its factorization.

22000172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28120 (or 28118 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 22000172 is about 4690.4340950492. The cubic root of 22000172 is about 280.2046632921.

Adding to 22000172 its reverse (27100022), we get a palindrome (49100194).

The spelling of 22000172 in words is "twenty-two million, one hundred seventy-two", and thus it is an aban number.