22150172 has 12 divisors (see below), whose sum is σ = 42286776. Its totient is φ = 10068240.

The previous prime is 22150169. The next prime is 22150187. The reversal of 22150172 is 27105122.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 251663 + ... + 251750.

It is an arithmetic number, because the mean of its divisors is an integer number (3523898).

Almost surely, 2^22150172 is an apocalyptic number.

22150172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22150172 is a deficient number, since it is larger than the sum of its proper divisors (20136604).

22150172 is a wasteful number, since it uses less digits than its factorization.

22150172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503428 (or 503426 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 22150172 is about 4706.3969233374. The cubic root of 22150172 is about 280.8400452354.

Adding to 22150172 its reverse (27105122), we get a palindrome (49255294).

It can be divided in two parts, 22150 and 172, that added together give a palindrome (22322).

The spelling of 22150172 in words is "twenty-two million, one hundred fifty thousand, one hundred seventy-two".