221243422 has 8 divisors (see below), whose sum is σ = 332296776. Its totient is φ = 110477832.

The previous prime is 221243413. The next prime is 221243431. The reversal of 221243422 is 224342122.

It is an interprime number because it is at equal distance from previous prime (221243413) and next prime (221243431).

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

It is a junction number, because it is equal to n+sod(n) for n = 221243393 and 221243402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70008 + ... + 73099.

It is an arithmetic number, because the mean of its divisors is an integer number (41537097).

Almost surely, 2^221243422 is an apocalyptic number.

221243422 is a deficient number, since it is larger than the sum of its proper divisors (111053354).

221243422 is a wasteful number, since it uses less digits than its factorization.

221243422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143882.

The product of its digits is 1536, while the sum is 22.

The square root of 221243422 is about 14874.2536619489. The cubic root of 221243422 is about 604.8162563838.

Adding to 221243422 its reverse (224342122), we get a palindrome (445585544).

The spelling of 221243422 in words is "two hundred twenty-one million, two hundred forty-three thousand, four hundred twenty-two".