216364225 has 24 divisors (see below), whose sum is σ = 334496448. Its totient is φ = 134875200.

The previous prime is 216364217. The next prime is 216364249. The reversal of 216364225 is 522463612.

216364225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216364225 - 2³ = 216364217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54274 + ... + 58123.

It is an arithmetic number, because the mean of its divisors is an integer number (13937352).

Almost surely, 2^216364225 is an apocalyptic number.

216364225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216364225 is a deficient number, since it is larger than the sum of its proper divisors (118132223).

216364225 is a wasteful number, since it uses less digits than its factorization.

216364225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112425 (or 112420 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 216364225 is about 14709.3244236437. The cubic root of 216364225 is about 600.3370559903.

The spelling of 216364225 in words is "two hundred sixteen million, three hundred sixty-four thousand, two hundred twenty-five".