221144442 has 32 divisors (see below), whose sum is σ = 453691392. Its totient is φ = 71823024.

The previous prime is 221144437. The next prime is 221144479. The reversal of 221144442 is 244441122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140343 + ... + 141909.

It is an arithmetic number, because the mean of its divisors is an integer number (14177856).

Almost surely, 2^221144442 is an apocalyptic number.

221144442 is an abundant number, since it is smaller than the sum of its proper divisors (232546950).

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

221144442 is a wasteful number, since it uses less digits than its factorization.

221144442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162.

The product of its digits is 2048, while the sum is 24.

The square root of 221144442 is about 14870.9260639679. The cubic root of 221144442 is about 604.7260485904.

Adding to 221144442 its reverse (244441122), we get a palindrome (465585564).

The spelling of 221144442 in words is "two hundred twenty-one million, one hundred forty-four thousand, four hundred forty-two".