22035561 has 16 divisors (see below), whose sum is σ = 29978880. Its totient is φ = 14394240.

The previous prime is 22035557. The next prime is 22035569. The reversal of 22035561 is 16553022.

It is not a de Polignac number, because 22035561 - 2² = 22035557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22035569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52131 + ... + 52551.

It is an arithmetic number, because the mean of its divisors is an integer number (1873680).

Almost surely, 2^22035561 is an apocalyptic number.

It is an amenable number.

22035561 is a deficient number, since it is larger than the sum of its proper divisors (7943319).

22035561 is a wasteful number, since it uses less digits than its factorization.

22035561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 22035561 is about 4694.2050445203. The cubic root of 22035561 is about 280.3548265211.

Adding to 22035561 its reverse (16553022), we get a palindrome (38588583).

The spelling of 22035561 in words is "twenty-two million, thirty-five thousand, five hundred sixty-one".