219042969 has 16 divisors (see below), whose sum is σ = 294700032. Its totient is φ = 144714128.

The previous prime is 219042953. The next prime is 219043031. The reversal of 219042969 is 969240912.

It is a cyclic number.

It is not a de Polignac number, because 219042969 - 2⁴ = 219042953 is a prime.

It is a super-2 number, since 2×219042969² = 95959644536669922, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 219042969.

It is not an unprimeable number, because it can be changed into a prime (219043969) 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 15 ways as a sum of consecutive naturals, for example, 178492 + ... + 179714.

It is an arithmetic number, because the mean of its divisors is an integer number (18418752).

Almost surely, 2^219042969 is an apocalyptic number.

It is an amenable number.

219042969 is a deficient number, since it is larger than the sum of its proper divisors (75657063).

219042969 is a wasteful number, since it uses less digits than its factorization.

219042969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 219042969 is about 14800.1003037142. The cubic root of 219042969 is about 602.8044353700.

The spelling of 219042969 in words is "two hundred nineteen million, forty-two thousand, nine hundred sixty-nine".