221065234 has 8 divisors (see below), whose sum is σ = 357105420. Its totient is φ = 102030096.

The previous prime is 221065223. The next prime is 221065237. The reversal of 221065234 is 432560122.

It can be written as a sum of positive squares in 2 ways, for example, as 209525625 + 11539609 = 14475^2 + 3397^2 .

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 = 221065199 and 221065208.

It is not an unprimeable number, because it can be changed into a prime (221065237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4251229 + ... + 4251280.

Almost surely, 2^221065234 is an apocalyptic number.

221065234 is a deficient number, since it is larger than the sum of its proper divisors (136040186).

221065234 is a wasteful number, since it uses less digits than its factorization.

221065234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8502524.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 221065234 is about 14868.2626422861. The cubic root of 221065234 is about 604.6538410922.

The spelling of 221065234 in words is "two hundred twenty-one million, sixty-five thousand, two hundred thirty-four".