231201222 has 16 divisors (see below), whose sum is σ = 528460032. Its totient is φ = 66057480.

The previous prime is 231201203. The next prime is 231201227. The reversal of 231201222 is 222102132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231201227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2752354 + ... + 2752437.

It is an arithmetic number, because the mean of its divisors is an integer number (33028752).

Almost surely, 2^231201222 is an apocalyptic number.

231201222 is an abundant number, since it is smaller than the sum of its proper divisors (297258810).

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

231201222 is a wasteful number, since it uses less digits than its factorization.

231201222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5504803.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 231201222 is about 15205.3024304024. The cubic root of 231201222 is about 613.7573533602.

Adding to 231201222 its reverse (222102132), we get a palindrome (453303354).

It can be divided in two parts, 23120 and 1222, that added together give a palindrome (24342).

The spelling of 231201222 in words is "two hundred thirty-one million, two hundred one thousand, two hundred twenty-two".