22120172 has 6 divisors (see below), whose sum is σ = 38710308. Its totient is φ = 11060084.

The previous prime is 22120169. The next prime is 22120183. The reversal of 22120172 is 27102122.

It is a super-3 number, since 3×22120172³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22120172.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2765018 + ... + 2765025.

It is an arithmetic number, because the mean of its divisors is an integer number (6451718).

Almost surely, 2^22120172 is an apocalyptic number.

It is an amenable number.

22120172 is a deficient number, since it is larger than the sum of its proper divisors (16590136).

22120172 is a wasteful number, since it uses less digits than its factorization.

22120172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5530047 (or 5530045 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 22120172 is about 4703.2086919464. The cubic root of 22120172 is about 280.7131988480.

Adding to 22120172 its reverse (27102122), we get a palindrome (49222294).

The spelling of 22120172 in words is "twenty-two million, one hundred twenty thousand, one hundred seventy-two".