22172472 has 192 divisors, whose sum is σ = 74692800. Its totient is φ = 5806080.

The previous prime is 22172459. The next prime is 22172473. The reversal of 22172472 is 27427122.

22172472 is a `hidden beast` number, since 22 + 172 + 472 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22172473) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 540772 + ... + 540812.

It is an arithmetic number, because the mean of its divisors is an integer number (389025).

Almost surely, 2^22172472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22172472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37346400).

22172472 is an abundant number, since it is smaller than the sum of its proper divisors (52520328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22172472 is a wasteful number, since it uses less digits than its factorization.

22172472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126 (or 119 counting only the distinct ones).

The product of its digits is 3136, while the sum is 27.

The square root of 22172472 is about 4708.7654432983. The cubic root of 22172472 is about 280.9342601920.

Adding to 22172472 its reverse (27427122), we get a palindrome (49599594).

The spelling of 22172472 in words is "twenty-two million, one hundred seventy-two thousand, four hundred seventy-two".