223641 has 20 divisors (see below), whose sum is σ = 365904. Its totient is φ = 135000.

The previous prime is 223637. The next prime is 223667. The reversal of 223641 is 146322.

It is a happy number.

223641 is a `hidden beast` number, since 2 + 23 + 641 = 666.

It is not a de Polignac number, because 223641 - 2² = 223637 is a prime.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (223621) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 766 + ... + 1016.

2²²³⁶⁴¹ is an apocalyptic number.

It is an amenable number.

223641 is a deficient number, since it is larger than the sum of its proper divisors (142263).

223641 is a wasteful number, since it uses less digits than its factorization.

223641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 265 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 223641 is about 472.9069675951. The cubic root of 223641 is about 60.6993175822.

Adding to 223641 its reverse (146322), we get a palindrome (369963).

It can be divided in two parts, 22 and 3641, that added together give a palindrome (3663).

The spelling of 223641 in words is "two hundred twenty-three thousand, six hundred forty-one".