223042400321 has 4 divisors (see below), whose sum is σ = 240199508052. Its totient is φ = 205885292592.

The previous prime is 223042400303. The next prime is 223042400327. The reversal of 223042400321 is 123004240322.

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 25110839296 + 197931561025 = 158464^2 + 444895^2 .

It is a cyclic number.

It is not a de Polignac number, because 223042400321 - 2¹⁰ = 223042399297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (223042400327) 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, 8578553846 + ... + 8578553871.

It is an arithmetic number, because the mean of its divisors is an integer number (60049877013).

Almost surely, 2^223042400321 is an apocalyptic number.

It is an amenable number.

223042400321 is a deficient number, since it is larger than the sum of its proper divisors (17157107731).

223042400321 is a wasteful number, since it uses less digits than its factorization.

223042400321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17157107730.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 223042400321 its reverse (123004240322), we get a palindrome (346046640643).

The spelling of 223042400321 in words is "two hundred twenty-three billion, forty-two million, four hundred thousand, three hundred twenty-one".