215323323 has 4 divisors (see below), whose sum is σ = 287097768. Its totient is φ = 143548880.

The previous prime is 215323301. The next prime is 215323357. The reversal of 215323323 is 323323512.

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 215323323 - 2¹⁴ = 215306939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215323293 and 215323302.

It is not an unprimeable number, because it can be changed into a prime (215323363) 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, 35887218 + ... + 35887223.

It is an arithmetic number, because the mean of its divisors is an integer number (71774442).

Almost surely, 2^215323323 is an apocalyptic number.

215323323 is a deficient number, since it is larger than the sum of its proper divisors (71774445).

215323323 is an equidigital number, since it uses as much as digits as its factorization.

215323323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71774444.

The product of its digits is 3240, while the sum is 24.

The square root of 215323323 is about 14673.8993795105. The cubic root of 215323323 is about 599.3727918005.

Adding to 215323323 its reverse (323323512), we get a palindrome (538646835).

The spelling of 215323323 in words is "two hundred fifteen million, three hundred twenty-three thousand, three hundred twenty-three".