420340222 has 16 divisors (see below), whose sum is σ = 665989632. Its totient is φ = 198659160.

The previous prime is 420340201. The next prime is 420340243. The reversal of 420340222 is 222043024.

It is an interprime number because it is at equal distance from previous prime (420340201) and next prime (420340243).

It is a self number, because there is not a number n which added to its sum of digits gives 420340222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76168 + ... + 81499.

It is an arithmetic number, because the mean of its divisors is an integer number (41624352).

Almost surely, 2^420340222 is an apocalyptic number.

420340222 is a deficient number, since it is larger than the sum of its proper divisors (245649410).

420340222 is a wasteful number, since it uses less digits than its factorization.

420340222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157743.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 420340222 is about 20502.2004184917. The cubic root of 420340222 is about 749.0893967757.

Adding to 420340222 its reverse (222043024), we get a palindrome (642383246).

The spelling of 420340222 in words is "four hundred twenty million, three hundred forty thousand, two hundred twenty-two".