215515211233 has 8 divisors (see below), whose sum is σ = 251329692800. Its totient is φ = 184727323620.

The previous prime is 215515211227. The next prime is 215515211279. The reversal of 215515211233 is 332112515512.

It is a happy number.

215515211233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215515211233 - 2⁹ = 215515210721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215515211195 and 215515211204.

It is not an unprimeable number, because it can be changed into a prime (215515211293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314161773 + ... + 314162458.

It is an arithmetic number, because the mean of its divisors is an integer number (31416211600).

Almost surely, 2^215515211233 is an apocalyptic number.

It is an amenable number.

215515211233 is a deficient number, since it is larger than the sum of its proper divisors (35814481567).

215515211233 is an frugal number, since it uses more digits than its factorization.

215515211233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628324252 (or 628324238 counting only the distinct ones).

The product of its digits is 9000, while the sum is 31.

Adding to 215515211233 its reverse (332112515512), we get a palindrome (547627726745).

The spelling of 215515211233 in words is "two hundred fifteen billion, five hundred fifteen million, two hundred eleven thousand, two hundred thirty-three".