22242561 has 8 divisors (see below), whose sum is σ = 32352864. Its totient is φ = 13480320.

The previous prime is 22242553. The next prime is 22242569. The reversal of 22242561 is 16524222.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22242553) and next prime (22242569).

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

It is not a de Polignac number, because 22242561 - 2³ = 22242553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22242569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336976 + ... + 337041.

It is an arithmetic number, because the mean of its divisors is an integer number (4044108).

Almost surely, 2^22242561 is an apocalyptic number.

It is an amenable number.

22242561 is a deficient number, since it is larger than the sum of its proper divisors (10110303).

22242561 is a wasteful number, since it uses less digits than its factorization.

22242561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674031.

The product of its digits is 1920, while the sum is 24.

The square root of 22242561 is about 4716.2019676854. The cubic root of 22242561 is about 281.2299675608.

Adding to 22242561 its reverse (16524222), we get a palindrome (38766783).

The spelling of 22242561 in words is "twenty-two million, two hundred forty-two thousand, five hundred sixty-one".