420040223 has 4 divisors (see below), whose sum is σ = 420527808. Its totient is φ = 419552640.

The previous prime is 420040213. The next prime is 420040241. The reversal of 420040223 is 322040024.

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

It is a cyclic number.

It is not a de Polignac number, because 420040223 - 2⁸ = 420039967 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 (420040213) 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, 242498 + ... + 244223.

It is an arithmetic number, because the mean of its divisors is an integer number (105131952).

Almost surely, 2^420040223 is an apocalyptic number.

420040223 is a deficient number, since it is larger than the sum of its proper divisors (487585).

420040223 is an equidigital number, since it uses as much as digits as its factorization.

420040223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487584.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 420040223 is about 20494.8828491407. The cubic root of 420040223 is about 748.9111446979.

Adding to 420040223 its reverse (322040024), we get a palindrome (742080247).

The spelling of 420040223 in words is "four hundred twenty million, forty thousand, two hundred twenty-three".