231320226 has 16 divisors (see below), whose sum is σ = 475144704. Its totient is φ = 75022704.

The previous prime is 231320191. The next prime is 231320227. The reversal of 231320226 is 622023132.

231320226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231320227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520770 + ... + 521213.

It is an arithmetic number, because the mean of its divisors is an integer number (29696544).

Almost surely, 2^231320226 is an apocalyptic number.

231320226 is an abundant number, since it is smaller than the sum of its proper divisors (243824478).

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

231320226 is a wasteful number, since it uses less digits than its factorization.

231320226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042025.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 231320226 is about 15209.2151671281. The cubic root of 231320226 is about 613.8626397876.

Adding to 231320226 its reverse (622023132), we get a palindrome (853343358).

The spelling of 231320226 in words is "two hundred thirty-one million, three hundred twenty thousand, two hundred twenty-six".