22123506 has 8 divisors (see below), whose sum is σ = 44247024. Its totient is φ = 7374500.

The previous prime is 22123499. The next prime is 22123547. The reversal of 22123506 is 60532122.

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

22123506 is an admirable 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, 1843620 + ... + 1843631.

It is an arithmetic number, because the mean of its divisors is an integer number (5530878).

Almost surely, 2^22123506 is an apocalyptic number.

22123506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22123506 is a wasteful number, since it uses less digits than its factorization.

22123506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3687256.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22123506 is about 4703.5631174674. The cubic root of 22123506 is about 280.7273013723.

Adding to 22123506 its reverse (60532122), we get a palindrome (82655628).

It can be divided in two parts, 2212350 and 6, that added together give a triangular number (2212356 = T₂₁₀₃).

The spelling of 22123506 in words is "twenty-two million, one hundred twenty-three thousand, five hundred six".