231222065 has 8 divisors (see below), whose sum is σ = 284965800. Its totient is φ = 179978112.

The previous prime is 231222053. The next prime is 231222067. The reversal of 231222065 is 560222132.

It can be written as a sum of positive squares in 4 ways, for example, as 11826721 + 219395344 = 3439^2 + 14812^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231222065 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231222065.

It is not an unprimeable number, because it can be changed into a prime (231222067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624740 + ... + 625109.

It is an arithmetic number, because the mean of its divisors is an integer number (35620725).

Almost surely, 2^231222065 is an apocalyptic number.

It is an amenable number.

231222065 is a deficient number, since it is larger than the sum of its proper divisors (53743735).

231222065 is a wasteful number, since it uses less digits than its factorization.

231222065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249891.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 231222065 is about 15205.9878008632. The cubic root of 231222065 is about 613.7757964001.

Adding to 231222065 its reverse (560222132), we get a palindrome (791444197).

The spelling of 231222065 in words is "two hundred thirty-one million, two hundred twenty-two thousand, sixty-five".