223402421 has 24 divisors (see below), whose sum is σ = 253368192. Its totient is φ = 196732800.

The previous prime is 223402409. The next prime is 223402433. The reversal of 223402421 is 124204322.

It is an interprime number because it is at equal distance from previous prime (223402409) and next prime (223402433).

It is not a de Polignac number, because 223402421 - 2¹⁰ = 223401397 is a prime.

It is a super-2 number, since 2×223402421² = 99817283417322482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 223402393 and 223402402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223402451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 926861 + ... + 927101.

It is an arithmetic number, because the mean of its divisors is an integer number (10557008).

Almost surely, 2^223402421 is an apocalyptic number.

It is an amenable number.

223402421 is a deficient number, since it is larger than the sum of its proper divisors (29965771).

223402421 is a wasteful number, since it uses less digits than its factorization.

223402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 223402421 is about 14946.6525014801. The cubic root of 223402421 is about 606.7772533514. Note that the first 3 decimals are identical.

Adding to 223402421 its reverse (124204322), we get a palindrome (347606743).

The spelling of 223402421 in words is "two hundred twenty-three million, four hundred two thousand, four hundred twenty-one".