22736161 has 4 divisors (see below), whose sum is σ = 25984192. Its totient is φ = 19488132.

The previous prime is 22736143. The next prime is 22736173. The reversal of 22736161 is 16163722.

22736161 = T₁₄₆₁ + T₁₄₆₂ + ... + T₁₄₈₁.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22736161 - 2⁷ = 22736033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22736111) by changing a digit.

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, 1624005 + ... + 1624018.

It is an arithmetic number, because the mean of its divisors is an integer number (6496048).

Almost surely, 2^22736161 is an apocalyptic number.

It is an amenable number.

22736161 is a deficient number, since it is larger than the sum of its proper divisors (3248031).

22736161 is an equidigital number, since it uses as much as digits as its factorization.

22736161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3248030.

The product of its digits is 3024, while the sum is 28.

The square root of 22736161 is about 4768.2450650108. The cubic root of 22736161 is about 283.2950885711.

Adding to 22736161 its reverse (16163722), we get a palindrome (38899883).

The spelling of 22736161 in words is "twenty-two million, seven hundred thirty-six thousand, one hundred sixty-one".