231205222 has 8 divisors (see below), whose sum is σ = 347304672. Its totient is φ = 115437000.

The previous prime is 231205207. The next prime is 231205259. The reversal of 231205222 is 222502132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 231205222.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 81054 + ... + 83857.

It is an arithmetic number, because the mean of its divisors is an integer number (43413084).

Almost surely, 2^231205222 is an apocalyptic number.

231205222 is a deficient number, since it is larger than the sum of its proper divisors (116099450).

231205222 is a wasteful number, since it uses less digits than its factorization.

231205222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165614.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 231205222 is about 15205.4339628963. The cubic root of 231205222 is about 613.7608928675.

Adding to 231205222 its reverse (222502132), we get a palindrome (453707354).

The spelling of 231205222 in words is "two hundred thirty-one million, two hundred five thousand, two hundred twenty-two".