423403303221 has 24 divisors (see below), whose sum is σ = 642191012160. Its totient is φ = 275704444008.

The previous prime is 423403303181. The next prime is 423403303241. The reversal of 423403303221 is 122303304324.

423403303221 is a `hidden beast` number, since 4 + 2 + 3 + 4 + 0 + 330 + 322 + 1 = 666.

It is not a de Polignac number, because 423403303221 - 2²¹ = 423401206069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423403303241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4190641 + ... + 4290486.

It is an arithmetic number, because the mean of its divisors is an integer number (26757958840).

Almost surely, 2^423403303221 is an apocalyptic number.

It is an amenable number.

423403303221 is a deficient number, since it is larger than the sum of its proper divisors (218787708939).

423403303221 is an equidigital number, since it uses as much as digits as its factorization.

423403303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8481222 (or 8481173 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 423403303221 its reverse (122303304324), we get a palindrome (545706607545).

The spelling of 423403303221 in words is "four hundred twenty-three billion, four hundred three million, three hundred three thousand, two hundred twenty-one".