221345422 has 16 divisors (see below), whose sum is σ = 347184000. Its totient is φ = 105637752.

The previous prime is 221345413. The next prime is 221345431. The reversal of 221345422 is 224543122.

It is an interprime number because it is at equal distance from previous prime (221345413) and next prime (221345431).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18133 + ... + 27775.

It is an arithmetic number, because the mean of its divisors is an integer number (21699000).

Almost surely, 2^221345422 is an apocalyptic number.

221345422 is a deficient number, since it is larger than the sum of its proper divisors (125838578).

221345422 is a wasteful number, since it uses less digits than its factorization.

221345422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10167.

The product of its digits is 3840, while the sum is 25.

The square root of 221345422 is about 14877.6820103133. The cubic root of 221345422 is about 604.9091883823.

Adding to 221345422 its reverse (224543122), we get a palindrome (445888544).

It can be divided in two parts, 22134 and 5422, that added together give a square (27556 = 166²).

The spelling of 221345422 in words is "two hundred twenty-one million, three hundred forty-five thousand, four hundred twenty-two".