221422312 has 16 divisors (see below), whose sum is σ = 415324800. Its totient is φ = 110669040.

The previous prime is 221422309. The next prime is 221422349. The reversal of 221422312 is 213224122.

It is a self number, because there is not a number n which added to its sum of digits gives 221422312.

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 in 3 ways as a sum of consecutive naturals, for example, 37737 + ... + 43207.

It is an arithmetic number, because the mean of its divisors is an integer number (25957800).

Almost surely, 2^221422312 is an apocalyptic number.

It is an amenable number.

221422312 is a deficient number, since it is larger than the sum of its proper divisors (193902488).

221422312 is a wasteful number, since it uses less digits than its factorization.

221422312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10536 (or 10532 counting only the distinct ones).

The product of its digits is 384, while the sum is 19.

The square root of 221422312 is about 14880.2658578400. The cubic root of 221422312 is about 604.9792238386.

Adding to 221422312 its reverse (213224122), we get a palindrome (434646434).

The spelling of 221422312 in words is "two hundred twenty-one million, four hundred twenty-two thousand, three hundred twelve".