2216161361 has 8 divisors (see below), whose sum is σ = 2409944040. Its totient is φ = 2029425408.

The previous prime is 2216161357. The next prime is 2216161369. The reversal of 2216161361 is 1631616122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 805708225 + 1410453136 = 28385^2 + 37556^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2216161361 - 2² = 2216161357 is a prime.

It is a super-2 number, since 2×2216161361² = 9822742355978744642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2216161369) 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 7 ways as a sum of consecutive naturals, for example, 1761026 + ... + 1762283.

It is an arithmetic number, because the mean of its divisors is an integer number (301243005).

Almost surely, 2^2216161361 is an apocalyptic number.

It is an amenable number.

2216161361 is a deficient number, since it is larger than the sum of its proper divisors (193782679).

2216161361 is a wasteful number, since it uses less digits than its factorization.

2216161361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3523363.

The product of its digits is 2592, while the sum is 29.

The square root of 2216161361 is about 47076.1230455525. The cubic root of 2216161361 is about 1303.7684267118.

Adding to 2216161361 its reverse (1631616122), we get a palindrome (3847777483).

The spelling of 2216161361 in words is "two billion, two hundred sixteen million, one hundred sixty-one thousand, three hundred sixty-one".