221231234 has 24 divisors (see below), whose sum is σ = 402882240. Its totient is φ = 89234496.

The previous prime is 221231233. The next prime is 221231239. The reversal of 221231234 is 432132122.

221231234 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×221231234³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221231233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23294 + ... + 31385.

It is an arithmetic number, because the mean of its divisors is an integer number (16786760).

Almost surely, 2^221231234 is an apocalyptic number.

221231234 is a deficient number, since it is larger than the sum of its proper divisors (181651006).

221231234 is a wasteful number, since it uses less digits than its factorization.

221231234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54722 (or 54705 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 221231234 is about 14873.8439550777. The cubic root of 221231234 is about 604.8051500109.

Adding to 221231234 its reverse (432132122), we get a palindrome (653363356).

The spelling of 221231234 in words is "two hundred twenty-one million, two hundred thirty-one thousand, two hundred thirty-four".