215052315323 has 4 divisors (see below), whose sum is σ = 218697269880. Its totient is φ = 211407360768.

The previous prime is 215052315239. The next prime is 215052315337. The reversal of 215052315323 is 323513250512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 215052315323 - 2²² = 215048121019 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 215052315323.

It is not an unprimeable number, because it can be changed into a prime (215052315223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1822477190 + ... + 1822477307.

It is an arithmetic number, because the mean of its divisors is an integer number (54674317470).

Almost surely, 2^215052315323 is an apocalyptic number.

215052315323 is a deficient number, since it is larger than the sum of its proper divisors (3644954557).

215052315323 is an equidigital number, since it uses as much as digits as its factorization.

215052315323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3644954556.

The product of its (nonzero) digits is 27000, while the sum is 32.

Adding to 215052315323 its reverse (323513250512), we get a palindrome (538565565835).

The spelling of 215052315323 in words is "two hundred fifteen billion, fifty-two million, three hundred fifteen thousand, three hundred twenty-three".