223632161 has 8 divisors (see below), whose sum is σ = 240669864. Its totient is φ = 207025920.

The previous prime is 223632133. The next prime is 223632187. The reversal of 223632161 is 161236322.

It can be written as a sum of positive squares in 4 ways, for example, as 57093136 + 166539025 = 7556^2 + 12905^2 .

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 223632161 - 2²² = 219437857 is a prime.

It is a super-2 number, since 2×223632161² = 100022686867059842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 223632161.

It is not an unprimeable number, because it can be changed into a prime (223632961) 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, 106790 + ... + 108863.

It is an arithmetic number, because the mean of its divisors is an integer number (30083733).

Almost surely, 2^223632161 is an apocalyptic number.

It is an amenable number.

223632161 is a deficient number, since it is larger than the sum of its proper divisors (17037703).

223632161 is a wasteful number, since it uses less digits than its factorization.

223632161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215731.

The product of its digits is 2592, while the sum is 26.

The square root of 223632161 is about 14954.3358595425. The cubic root of 223632161 is about 606.9851789529.

Adding to 223632161 its reverse (161236322), we get a palindrome (384868483).

The spelling of 223632161 in words is "two hundred twenty-three million, six hundred thirty-two thousand, one hundred sixty-one".