215305304320 has 36 divisors (see below), whose sum is σ = 515723489820. Its totient is φ = 86122121216.

The previous prime is 215305304311. The next prime is 215305304329. The reversal of 215305304320 is 23403503512.

It is an interprime number because it is at equal distance from previous prime (215305304311) and next prime (215305304329).

It can be written as a sum of positive squares in 2 ways, for example, as 105484646656 + 109820657664 = 324784^2 + 331392^2 .

It is not an unprimeable number, because it can be changed into a prime (215305304329) 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, 84102355 + ... + 84104914.

It is an arithmetic number, because the mean of its divisors is an integer number (14325652495).

Almost surely, 2^215305304320 is an apocalyptic number.

215305304320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215305304320 is an abundant number, since it is smaller than the sum of its proper divisors (300418185500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215305304320 is an equidigital number, since it uses as much as digits as its factorization.

215305304320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168207290 (or 168207276 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 215305304320 its reverse (23403503512), we get a palindrome (238708807832).

The spelling of 215305304320 in words is "two hundred fifteen billion, three hundred five million, three hundred four thousand, three hundred twenty".