221219234 has 16 divisors (see below), whose sum is σ = 333963000. Its totient is φ = 109901184.

The previous prime is 221219233. The next prime is 221219237. The reversal of 221219234 is 432912122.

221219234 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 130074025 + 91145209 = 11405^2 + 9547^2 .

It is not an unprimeable number, because it can be changed into a prime (221219233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388502 + ... + 389070.

Almost surely, 2^221219234 is an apocalyptic number.

221219234 is a deficient number, since it is larger than the sum of its proper divisors (112743766).

221219234 is a wasteful number, since it uses less digits than its factorization.

221219234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477.

The product of its digits is 1728, while the sum is 26.

The square root of 221219234 is about 14873.4405569122. The cubic root of 221219234 is about 604.7942145552.

The spelling of 221219234 in words is "two hundred twenty-one million, two hundred nineteen thousand, two hundred thirty-four".