22013161 has 2 divisors, whose sum is σ = 22013162. Its totient is φ = 22013160.

The previous prime is 22013149. The next prime is 22013203. The reversal of 22013161 is 16131022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16040025 + 5973136 = 4005^2 + 2444^2 .

It is a cyclic number.

It is not a de Polignac number, because 22013161 - 2¹¹ = 22011113 is a prime.

It is not a weakly prime, because it can be changed into another prime (22013561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006580 + 11006581.

It is an arithmetic number, because the mean of its divisors is an integer number (11006581).

Almost surely, 2^22013161 is an apocalyptic number.

It is an amenable number.

22013161 is a deficient number, since it is larger than the sum of its proper divisors (1).

22013161 is an equidigital number, since it uses as much as digits as its factorization.

22013161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 22013161 is about 4691.8185173768. The cubic root of 22013161 is about 280.2597971388.

Adding to 22013161 its reverse (16131022), we get a palindrome (38144183).

The spelling of 22013161 in words is "twenty-two million, thirteen thousand, one hundred sixty-one".