215211630305 has 96 divisors (see below), whose sum is σ = 330462519552. Its totient is φ = 131271598080.

The previous prime is 215211630301. The next prime is 215211630317. The reversal of 215211630305 is 503036112512.

It is not a de Polignac number, because 215211630305 - 2² = 215211630301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215211630301) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 24582809 + ... + 24591561.

It is an arithmetic number, because the mean of its divisors is an integer number (3442317912).

Almost surely, 2^215211630305 is an apocalyptic number.

It is an amenable number.

215211630305 is a deficient number, since it is larger than the sum of its proper divisors (115250889247).

215211630305 is a wasteful number, since it uses less digits than its factorization.

215211630305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8887 (or 8856 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 215211630305 its reverse (503036112512), we get a palindrome (718247742817).

The spelling of 215211630305 in words is "two hundred fifteen billion, two hundred eleven million, six hundred thirty thousand, three hundred five".