31230213440233 has 8 divisors (see below), whose sum is σ = 32074386928200. Its totient is φ = 30386045934720.

The previous prime is 31230213440221. The next prime is 31230213440243. The reversal of 31230213440233 is 33204431203213.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20197366245904 + 11032847194329 = 4494148^2 + 3321573^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 31230213440233 - 2³³ = 31221623505641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31230213440195 and 31230213440204.

It is not an unprimeable number, because it can be changed into a prime (31230213440213) 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, 10333743 + ... + 13009483.

It is an arithmetic number, because the mean of its divisors is an integer number (4009298366025).

Almost surely, 2^{31230213440233} is an apocalyptic number.

It is an amenable number.

31230213440233 is a deficient number, since it is larger than the sum of its proper divisors (844173487967).

31230213440233 is a wasteful number, since it uses less digits than its factorization.

31230213440233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991227.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 31230213440233 its reverse (33204431203213), we get a palindrome (64434644643446).

The spelling of 31230213440233 in words is "thirty-one trillion, two hundred thirty billion, two hundred thirteen million, four hundred forty thousand, two hundred thirty-three".