231244222 has 8 divisors (see below), whose sum is σ = 378399672. Its totient is φ = 105111000.

The previous prime is 231244207. The next prime is 231244243. The reversal of 231244222 is 222442132.

231244222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 10511101 = 231244222 / (2 + 3 + 1 + 2 + 4 + 4 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 231244193 and 231244202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5255529 + ... + 5255572.

It is an arithmetic number, because the mean of its divisors is an integer number (47299959).

Almost surely, 2^231244222 is an apocalyptic number.

231244222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231244222 is a deficient number, since it is larger than the sum of its proper divisors (147155450).

231244222 is a wasteful number, since it uses less digits than its factorization.

231244222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10511114.

The product of its digits is 1536, while the sum is 22.

The square root of 231244222 is about 15206.7163450891. The cubic root of 231244222 is about 613.7954009247.

Adding to 231244222 its reverse (222442132), we get a palindrome (453686354).

The spelling of 231244222 in words is "two hundred thirty-one million, two hundred forty-four thousand, two hundred twenty-two".