420223523 has 2 divisors, whose sum is σ = 420223524. Its totient is φ = 420223522.

The previous prime is 420223519. The next prime is 420223579. The reversal of 420223523 is 325322024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420223523 - 2² = 420223519 is a prime.

It is not a weakly prime, because it can be changed into another prime (420223123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210111761 + 210111762.

It is an arithmetic number, because the mean of its divisors is an integer number (210111762).

Almost surely, 2^420223523 is an apocalyptic number.

420223523 is a deficient number, since it is larger than the sum of its proper divisors (1).

420223523 is an equidigital number, since it uses as much as digits as its factorization.

420223523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 420223523 is about 20499.3542093404. The cubic root of 420223523 is about 749.0200671628.

Adding to 420223523 its reverse (325322024), we get a palindrome (745545547).

The spelling of 420223523 in words is "four hundred twenty million, two hundred twenty-three thousand, five hundred twenty-three".