422312220 has 72 divisors (see below), whose sum is σ = 1397476080. Its totient is φ = 102378240.

The previous prime is 422312207. The next prime is 422312237. The reversal of 422312220 is 22213224.

It is a super-2 number, since 2×422312220² = 356695222322656800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 422312193 and 422312202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104665 + ... + 108624.

It is an arithmetic number, because the mean of its divisors is an integer number (19409390).

Almost surely, 2^422312220 is an apocalyptic number.

It is an amenable number.

422312220 is an abundant number, since it is smaller than the sum of its proper divisors (975163860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

422312220 is a wasteful number, since it uses less digits than its factorization.

422312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213315 (or 213310 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 422312220 is about 20550.2364949895. The cubic root of 422312220 is about 750.2590038790.

Adding to 422312220 its reverse (22213224), we get a palindrome (444525444).

The spelling of 422312220 in words is "four hundred twenty-two million, three hundred twelve thousand, two hundred twenty".