219428699 has 16 divisors (see below), whose sum is σ = 259522560. Its totient is φ = 181621440.

The previous prime is 219428689. The next prime is 219428719. The reversal of 219428699 is 996824912.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-219428699 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219428659) 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, 22694 + ... + 30884.

It is an arithmetic number, because the mean of its divisors is an integer number (16220160).

Almost surely, 2^219428699 is an apocalyptic number.

219428699 is a deficient number, since it is larger than the sum of its proper divisors (40093861).

219428699 is an equidigital number, since it uses as much as digits as its factorization.

219428699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8330.

The product of its digits is 559872, while the sum is 50.

The square root of 219428699 is about 14813.1259023881. The cubic root of 219428699 is about 603.1580697913.

The spelling of 219428699 in words is "two hundred nineteen million, four hundred twenty-eight thousand, six hundred ninety-nine".