22318161 has 16 divisors (see below), whose sum is σ = 32243904. Its totient is φ = 13676544.

The previous prime is 22318157. The next prime is 22318181. The reversal of 22318161 is 16181322.

It is not a de Polignac number, because 22318161 - 2² = 22318157 is a prime.

It is a super-3 number, since 3×22318161³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22318151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2896 + ... + 7281.

It is an arithmetic number, because the mean of its divisors is an integer number (2015244).

Almost surely, 2^22318161 is an apocalyptic number.

It is an amenable number.

22318161 is a deficient number, since it is larger than the sum of its proper divisors (9925743).

22318161 is a wasteful number, since it uses less digits than its factorization.

22318161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10240.

The product of its digits is 576, while the sum is 24.

The square root of 22318161 is about 4724.2100927033. The cubic root of 22318161 is about 281.5482304176.

Adding to 22318161 its reverse (16181322), we get a palindrome (38499483).

The spelling of 22318161 in words is "twenty-two million, three hundred eighteen thousand, one hundred sixty-one".