216466225 has 12 divisors (see below), whose sum is σ = 280089216. Its totient is φ = 165643280.

The previous prime is 216466223. The next prime is 216466249. The reversal of 216466225 is 522664612.

It is not a de Polignac number, because 216466225 - 2¹ = 216466223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216466223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187657 + ... + 188806.

It is an arithmetic number, because the mean of its divisors is an integer number (23340768).

Almost surely, 2^216466225 is an apocalyptic number.

216466225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216466225 is a deficient number, since it is larger than the sum of its proper divisors (63622991).

216466225 is a wasteful number, since it uses less digits than its factorization.

216466225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376496 (or 376491 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 216466225 is about 14712.7912035752. The cubic root of 216466225 is about 600.4313795932.

The spelling of 216466225 in words is "two hundred sixteen million, four hundred sixty-six thousand, two hundred twenty-five".