216344368225 has 6 divisors (see below), whose sum is σ = 268267016630. Its totient is φ = 173075494560.

The previous prime is 216344368223. The next prime is 216344368291. The reversal of 216344368225 is 522863443612.

It can be written as a sum of positive squares in 3 ways, for example, as 2190146401 + 214154221824 = 46799^2 + 462768^2 .

It is not a de Polignac number, because 216344368225 - 2¹ = 216344368223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216344368223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4326887340 + ... + 4326887389.

Almost surely, 2^216344368225 is an apocalyptic number.

216344368225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216344368225 is a deficient number, since it is larger than the sum of its proper divisors (51922648405).

216344368225 is an equidigital number, since it uses as much as digits as its factorization.

216344368225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8653774739 (or 8653774734 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 46.

The spelling of 216344368225 in words is "two hundred sixteen billion, three hundred forty-four million, three hundred sixty-eight thousand, two hundred twenty-five".