231201366 has 64 divisors (see below), whose sum is σ = 522740736. Its totient is φ = 67564800.

The previous prime is 231201361. The next prime is 231201391. The reversal of 231201366 is 663102132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231201361) 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 in 31 ways as a sum of consecutive naturals, for example, 225936 + ... + 226956.

It is an arithmetic number, because the mean of its divisors is an integer number (8167824).

Almost surely, 2^231201366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231201366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261370368).

231201366 is an abundant number, since it is smaller than the sum of its proper divisors (291539370).

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

231201366 is a wasteful number, since it uses less digits than its factorization.

231201366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 231201366 is about 15205.3071655919. The cubic root of 231201366 is about 613.7574807832.

Adding to 231201366 its reverse (663102132), we get a palindrome (894303498).

The spelling of 231201366 in words is "two hundred thirty-one million, two hundred one thousand, three hundred sixty-six".