22716161 has 8 divisors (see below), whose sum is σ = 24518760. Its totient is φ = 20921472.

The previous prime is 22716143. The next prime is 22716163. The reversal of 22716161 is 16161722.

It can be written as a sum of positive squares in 4 ways, for example, as 1739761 + 20976400 = 1319^2 + 4580^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-22716161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22716161.

It is not an unprimeable number, because it can be changed into a prime (22716163) 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, 4901 + ... + 8333.

It is an arithmetic number, because the mean of its divisors is an integer number (3064845).

Almost surely, 2^22716161 is an apocalyptic number.

It is an amenable number.

22716161 is a deficient number, since it is larger than the sum of its proper divisors (1802599).

22716161 is a wasteful number, since it uses less digits than its factorization.

22716161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3955.

The product of its digits is 1008, while the sum is 26.

The square root of 22716161 is about 4766.1473959583. The cubic root of 22716161 is about 283.2119967959.

Adding to 22716161 its reverse (16161722), we get a palindrome (38877883).

The spelling of 22716161 in words is "twenty-two million, seven hundred sixteen thousand, one hundred sixty-one".