22172470 has 8 divisors (see below), whose sum is σ = 39910464. Its totient is φ = 8868984.

The previous prime is 22172459. The next prime is 22172473. The reversal of 22172470 is 7427122.

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

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1108614 + ... + 1108633.

It is an arithmetic number, because the mean of its divisors is an integer number (4988808).

Almost surely, 2^22172470 is an apocalyptic number.

22172470 is a deficient number, since it is larger than the sum of its proper divisors (17737994).

22172470 is a wasteful number, since it uses less digits than its factorization.

22172470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217254.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 22172470 is about 4708.7652309284. The cubic root of 22172470 is about 280.9342517451.

Adding to 22172470 its reverse (7427122), we get a palindrome (29599592).

The spelling of 22172470 in words is "twenty-two million, one hundred seventy-two thousand, four hundred seventy".