219346985 has 36 divisors (see below), whose sum is σ = 313452804. Its totient is φ = 146372160.

The previous prime is 219346961. The next prime is 219346991. The reversal of 219346985 is 589643912.

It can be written as a sum of positive squares in 2 ways, for example, as 53993104 + 165353881 = 7348^2 + 12859^2 .

It is not a de Polignac number, because 219346985 - 2¹² = 219342889 is a prime.

It is a super-2 number, since 2×219346985² = 96226199657180450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 1313372 + ... + 1313538.

Almost surely, 2^219346985 is an apocalyptic number.

It is an amenable number.

219346985 is a deficient number, since it is larger than the sum of its proper divisors (94105819).

219346985 is a wasteful number, since it uses less digits than its factorization.

219346985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 196 counting only the distinct ones).

The product of its digits is 466560, while the sum is 47.

The square root of 219346985 is about 14810.3674836244. The cubic root of 219346985 is about 603.0831896169.

The spelling of 219346985 in words is "two hundred nineteen million, three hundred forty-six thousand, nine hundred eighty-five".