420310221 has 8 divisors (see below), whose sum is σ = 561855840. Its totient is φ = 279485712.

The previous prime is 420310217. The next prime is 420310279. The reversal of 420310221 is 122013024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420310221 - 2² = 420310217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420310221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420310291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178915 + ... + 181248.

It is an arithmetic number, because the mean of its divisors is an integer number (70231980).

Almost surely, 2^420310221 is an apocalyptic number.

It is an amenable number.

420310221 is a deficient number, since it is larger than the sum of its proper divisors (141545619).

420310221 is a wasteful number, since it uses less digits than its factorization.

420310221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360555.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 420310221 is about 20501.4687522626. The cubic root of 420310221 is about 749.0715747318.

Adding to 420310221 its reverse (122013024), we get a palindrome (542323245).

The spelling of 420310221 in words is "four hundred twenty million, three hundred ten thousand, two hundred twenty-one".