215322510243 has 16 divisors (see below), whose sum is σ = 302664281600. Its totient is φ = 135787402080.

The previous prime is 215322510241. The next prime is 215322510251. The reversal of 215322510243 is 342015223512.

It is not a de Polignac number, because 215322510243 - 2¹ = 215322510241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215322510243.

It is not an unprimeable number, because it can be changed into a prime (215322510241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2819803 + ... + 2895156.

It is an arithmetic number, because the mean of its divisors is an integer number (18916517600).

Almost surely, 2^215322510243 is an apocalyptic number.

215322510243 is a deficient number, since it is larger than the sum of its proper divisors (87341771357).

215322510243 is a wasteful number, since it uses less digits than its factorization.

215322510243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5715642.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 215322510243 its reverse (342015223512), we get a palindrome (557337733755).

The spelling of 215322510243 in words is "two hundred fifteen billion, three hundred twenty-two million, five hundred ten thousand, two hundred forty-three".