222543642 has 8 divisors (see below), whose sum is σ = 445087296. Its totient is φ = 74181212.

The previous prime is 222543631. The next prime is 222543691. The reversal of 222543642 is 246345222.

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

222543642 is an admirable 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, 18545298 + ... + 18545309.

It is an arithmetic number, because the mean of its divisors is an integer number (55635912).

Almost surely, 2^222543642 is an apocalyptic number.

222543642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222543642 is a wasteful number, since it uses less digits than its factorization.

222543642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37090612.

The product of its digits is 23040, while the sum is 30.

The square root of 222543642 is about 14917.8967016131. The cubic root of 222543642 is about 605.9987528430.

Adding to 222543642 its reverse (246345222), we get a palindrome (468888864).

The spelling of 222543642 in words is "two hundred twenty-two million, five hundred forty-three thousand, six hundred forty-two".