223401421 has 4 divisors (see below), whose sum is σ = 223692700. Its totient is φ = 223110144.

The previous prime is 223401401. The next prime is 223401439. The reversal of 223401421 is 124104322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 135978921 + 87422500 = 11661^2 + 9350^2 .

It is a cyclic number.

It is not a de Polignac number, because 223401421 - 2¹³ = 223393229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223401401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144486 + ... + 146023.

It is an arithmetic number, because the mean of its divisors is an integer number (55923175).

Almost surely, 2^223401421 is an apocalyptic number.

It is an amenable number.

223401421 is a deficient number, since it is larger than the sum of its proper divisors (291279).

223401421 is an equidigital number, since it uses as much as digits as its factorization.

223401421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291278.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 223401421 is about 14946.6190491362. The cubic root of 223401421 is about 606.7763479924.

Adding to 223401421 its reverse (124104322), we get a palindrome (347505743).

The spelling of 223401421 in words is "two hundred twenty-three million, four hundred one thousand, four hundred twenty-one".