22172471 has 8 divisors (see below), whose sum is σ = 24234624. Its totient is φ = 20194560.

The previous prime is 22172459. The next prime is 22172473. The reversal of 22172471 is 17427122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22172471 - 2²² = 17978167 is a prime.

It is a super-3 number, since 3×22172471³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22172471.

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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20510 + ... + 21563.

It is an arithmetic number, because the mean of its divisors is an integer number (3029328).

Almost surely, 2^22172471 is an apocalyptic number.

22172471 is a deficient number, since it is larger than the sum of its proper divisors (2062153).

22172471 is a wasteful number, since it uses less digits than its factorization.

22172471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42121.

The product of its digits is 1568, while the sum is 26.

The square root of 22172471 is about 4708.7653371133. The cubic root of 22172471 is about 280.9342559686.

Adding to 22172471 its reverse (17427122), we get a palindrome (39599593).

The spelling of 22172471 in words is "twenty-two million, one hundred seventy-two thousand, four hundred seventy-one".