221144434 has 8 divisors (see below), whose sum is σ = 379104768. Its totient is φ = 94776180.

The previous prime is 221144419. The next prime is 221144437. The reversal of 221144434 is 434441122.

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 = 221144399 and 221144408.

It is not an unprimeable number, because it can be changed into a prime (221144437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7898002 + ... + 7898029.

It is an arithmetic number, because the mean of its divisors is an integer number (47388096).

Almost surely, 2^221144434 is an apocalyptic number.

221144434 is a deficient number, since it is larger than the sum of its proper divisors (157960334).

221144434 is a wasteful number, since it uses less digits than its factorization.

221144434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15796040.

The product of its digits is 3072, while the sum is 25.

The square root of 221144434 is about 14870.9257949867. The cubic root of 221144434 is about 604.7260412984.

Adding to 221144434 its reverse (434441122), we get a palindrome (655585556).

The spelling of 221144434 in words is "two hundred twenty-one million, one hundred forty-four thousand, four hundred thirty-four".