231140222 has 8 divisors (see below), whose sum is σ = 354773496. Its totient is φ = 112882392.

The previous prime is 231140207. The next prime is 231140227. The reversal of 231140222 is 222041132.

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

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 231140222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231140227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1343753 + ... + 1343924.

It is an arithmetic number, because the mean of its divisors is an integer number (44346687).

Almost surely, 2^231140222 is an apocalyptic number.

231140222 is a deficient number, since it is larger than the sum of its proper divisors (123633274).

231140222 is a wasteful number, since it uses less digits than its factorization.

231140222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687722.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 231140222 is about 15203.2964188692. The cubic root of 231140222 is about 613.7033708144.

Adding to 231140222 its reverse (222041132), we get a palindrome (453181354).

The spelling of 231140222 in words is "two hundred thirty-one million, one hundred forty thousand, two hundred twenty-two".