22135561 has 8 divisors (see below), whose sum is σ = 25727040. Its totient is φ = 18651408.

The previous prime is 22135559. The next prime is 22135577. The reversal of 22135561 is 16553122.

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 22135561 - 2¹ = 22135559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22135541) 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, 26386 + ... + 27211.

It is an arithmetic number, because the mean of its divisors is an integer number (3215880).

Almost surely, 2^22135561 is an apocalyptic number.

It is an amenable number.

22135561 is a deficient number, since it is larger than the sum of its proper divisors (3591479).

22135561 is an equidigital number, since it uses as much as digits as its factorization.

22135561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53663.

The product of its digits is 1800, while the sum is 25.

The square root of 22135561 is about 4704.8444182566. The cubic root of 22135561 is about 280.7782811331.

Adding to 22135561 its reverse (16553122), we get a palindrome (38688683).

The spelling of 22135561 in words is "twenty-two million, one hundred thirty-five thousand, five hundred sixty-one".