221022422 has 8 divisors (see below), whose sum is σ = 335259000. Its totient is φ = 109269424.

The previous prime is 221022407. The next prime is 221022469. The reversal of 221022422 is 224220122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×221022422² = 97701822053492168, 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 221022422.

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 in 3 ways as a sum of consecutive naturals, for example, 620672 + ... + 621027.

It is an arithmetic number, because the mean of its divisors is an integer number (41907375).

Almost surely, 2^221022422 is an apocalyptic number.

221022422 is a deficient number, since it is larger than the sum of its proper divisors (114236578).

221022422 is a wasteful number, since it uses less digits than its factorization.

221022422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241790.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 221022422 is about 14866.8228616608. The cubic root of 221022422 is about 604.6148056892.

Adding to 221022422 its reverse (224220122), we get a palindrome (445242544).

The spelling of 221022422 in words is "two hundred twenty-one million, twenty-two thousand, four hundred twenty-two".