231216366 has 8 divisors (see below), whose sum is σ = 462432744. Its totient is φ = 77072120.

The previous prime is 231216361. The next prime is 231216389. The reversal of 231216366 is 663612132.

231216366 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.

231216366 is an admirable number.

It is a super-2 number, since 2×231216366² = 106922015812491912, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231216361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19268025 + ... + 19268036.

It is an arithmetic number, because the mean of its divisors is an integer number (57804093).

Almost surely, 2^231216366 is an apocalyptic number.

231216366 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

231216366 is a wasteful number, since it uses less digits than its factorization.

231216366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38536066.

The product of its digits is 7776, while the sum is 30.

The square root of 231216366 is about 15205.8004064239. The cubic root of 231216366 is about 613.7707537196.

Adding to 231216366 its reverse (663612132), we get a palindrome (894828498).

The spelling of 231216366 in words is "two hundred thirty-one million, two hundred sixteen thousand, three hundred sixty-six".