420023222 has 4 divisors (see below), whose sum is σ = 630034836. Its totient is φ = 210011610.

The previous prime is 420023207. The next prime is 420023273. The reversal of 420023222 is 222320024.

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

It is a super-2 number, since 2×420023222² = 352839014038522568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 420023222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105005804 + ... + 105005807.

It is an arithmetic number, because the mean of its divisors is an integer number (157508709).

Almost surely, 2^420023222 is an apocalyptic number.

420023222 is a deficient number, since it is larger than the sum of its proper divisors (210011614).

420023222 is a wasteful number, since it uses less digits than its factorization.

420023222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210011613.

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

The square root of 420023222 is about 20494.4680828754. The cubic root of 420023222 is about 748.9010405782.

Adding to 420023222 its reverse (222320024), we get a palindrome (642343246).

The spelling of 420023222 in words is "four hundred twenty million, twenty-three thousand, two hundred twenty-two".