216284995 has 4 divisors (see below), whose sum is σ = 259542000. Its totient is φ = 173027992.

The previous prime is 216284993. The next prime is 216285007. The reversal of 216284995 is 599482612.

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 216284995 - 2¹ = 216284993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216284993) 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, 21628495 + ... + 21628504.

It is an arithmetic number, because the mean of its divisors is an integer number (64885500).

Almost surely, 2^216284995 is an apocalyptic number.

216284995 is a deficient number, since it is larger than the sum of its proper divisors (43257005).

216284995 is an equidigital number, since it uses as much as digits as its factorization.

216284995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43257004.

The product of its digits is 311040, while the sum is 46.

The square root of 216284995 is about 14706.6309874152. The cubic root of 216284995 is about 600.2637682861.

The spelling of 216284995 in words is "two hundred sixteen million, two hundred eighty-four thousand, nine hundred ninety-five".