223523421 has 12 divisors (see below), whose sum is σ = 327588576. Its totient is φ = 135468520.

The previous prime is 223523383. The next prime is 223523441. The reversal of 223523421 is 124325322.

223523421 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 223523421 - 2⁹ = 223522909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 223523391 and 223523400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223523441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 307521 + ... + 308246.

It is an arithmetic number, because the mean of its divisors is an integer number (27299048).

Almost surely, 2^223523421 is an apocalyptic number.

It is an amenable number.

223523421 is a deficient number, since it is larger than the sum of its proper divisors (104065155).

223523421 is a wasteful number, since it uses less digits than its factorization.

223523421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615792 (or 615781 counting only the distinct ones).

The product of its digits is 2880, while the sum is 24.

The square root of 223523421 is about 14950.6996826236. The cubic root of 223523421 is about 606.8867818515.

Adding to 223523421 its reverse (124325322), we get a palindrome (347848743).

The spelling of 223523421 in words is "two hundred twenty-three million, five hundred twenty-three thousand, four hundred twenty-one".