30219169 has 4 divisors (see below), whose sum is σ = 30789396. Its totient is φ = 29648944.

The previous prime is 30219157. The next prime is 30219179. The reversal of 30219169 is 96191203.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17114769 + 13104400 = 4137^2 + 3620^2 .

It is a cyclic number.

It is not a de Polignac number, because 30219169 - 2⁷ = 30219041 is a prime.

It is a super-2 number, since 2×30219169² = 1826396350101122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 30219169.

It is not an unprimeable number, because it can be changed into a prime (30219109) 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 3 ways as a sum of consecutive naturals, for example, 285034 + ... + 285139.

It is an arithmetic number, because the mean of its divisors is an integer number (7697349).

Almost surely, 2^30219169 is an apocalyptic number.

It is an amenable number.

30219169 is a deficient number, since it is larger than the sum of its proper divisors (570227).

30219169 is an equidigital number, since it uses as much as digits as its factorization.

30219169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570226.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 30219169 is about 5497.1964672913. The cubic root of 30219169 is about 311.4780920828.

The spelling of 30219169 in words is "thirty million, two hundred nineteen thousand, one hundred sixty-nine".