221422412 has 12 divisors (see below), whose sum is σ = 388514280. Its totient is φ = 110418336.

The previous prime is 221422379. The next prime is 221422417. The reversal of 221422412 is 214224122.

221422412 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (221422417) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 71513 + ... + 74544.

It is an arithmetic number, because the mean of its divisors is an integer number (32376190).

Almost surely, 2^221422412 is an apocalyptic number.

It is an amenable number.

221422412 is a deficient number, since it is larger than the sum of its proper divisors (167091868).

221422412 is a wasteful number, since it uses less digits than its factorization.

221422412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146440 (or 146438 counting only the distinct ones).

The product of its digits is 512, while the sum is 20.

The square root of 221422412 is about 14880.2692179947. The cubic root of 221422412 is about 604.9793149133.

Adding to 221422412 its reverse (214224122), we get a palindrome (435646534).

It can be divided in two parts, 2 and 21422412, that multiplied together give a palindrome (42844824).

The spelling of 221422412 in words is "two hundred twenty-one million, four hundred twenty-two thousand, four hundred twelve".