219212985 has 16 divisors (see below), whose sum is σ = 351395136. Its totient is φ = 116695488.

The previous prime is 219212927. The next prime is 219212989. The reversal of 219212985 is 589212912.

219212985 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 219212985 - 2⁶ = 219212921 is a prime.

It is a super-2 number, since 2×219212985² = 96108665585220450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (219212989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5154 + ... + 21563.

It is an arithmetic number, because the mean of its divisors is an integer number (21962196).

Almost surely, 2^219212985 is an apocalyptic number.

It is an amenable number.

219212985 is a deficient number, since it is larger than the sum of its proper divisors (132182151).

219212985 is a wasteful number, since it uses less digits than its factorization.

219212985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27272.

The product of its digits is 25920, while the sum is 39.

The square root of 219212985 is about 14805.8429344634. The cubic root of 219212985 is about 602.9603559106.

The spelling of 219212985 in words is "two hundred nineteen million, two hundred twelve thousand, nine hundred eighty-five".