223504161 has 32 divisors (see below), whose sum is σ = 318638208. Its totient is φ = 139138560.

The previous prime is 223504157. The next prime is 223504207. The reversal of 223504161 is 161405322.

It is not a de Polignac number, because 223504161 - 2² = 223504157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (223504111) 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 31 ways as a sum of consecutive naturals, for example, 304551 + ... + 305283.

It is an arithmetic number, because the mean of its divisors is an integer number (9957444).

Almost surely, 2^223504161 is an apocalyptic number.

It is an amenable number.

223504161 is a deficient number, since it is larger than the sum of its proper divisors (95134047).

223504161 is a wasteful number, since it uses less digits than its factorization.

223504161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 223504161 is about 14950.0555517363. The cubic root of 223504161 is about 606.8693504565.

Adding to 223504161 its reverse (161405322), we get a palindrome (384909483).

The spelling of 223504161 in words is "two hundred twenty-three million, five hundred four thousand, one hundred sixty-one".