231235066 has 4 divisors (see below), whose sum is σ = 346852602. Its totient is φ = 115617532.

The previous prime is 231235063. The next prime is 231235091. The reversal of 231235066 is 660532132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 202236841 + 28998225 = 14221^2 + 5385^2 .

It is not an unprimeable number, because it can be changed into a prime (231235061) 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 as a sum of consecutive naturals, namely, 57808765 + ... + 57808768.

Almost surely, 2^231235066 is an apocalyptic number.

231235066 is a deficient number, since it is larger than the sum of its proper divisors (115617536).

231235066 is a wasteful number, since it uses less digits than its factorization.

231235066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115617535.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 231235066 is about 15206.4152909224. The cubic root of 231235066 is about 613.7872998432.

Adding to 231235066 its reverse (660532132), we get a palindrome (891767198).

The spelling of 231235066 in words is "two hundred thirty-one million, two hundred thirty-five thousand, sixty-six".