30105197209 has 4 divisors (see below), whose sum is σ = 30105650740. Its totient is φ = 30104743680.

The previous prime is 30105197189. The next prime is 30105197231. The reversal of 30105197209 is 90279150103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90279150103 = 571 ⋅158107093.

It can be written as a sum of positive squares in 2 ways, for example, as 17089809984 + 13015387225 = 130728^2 + 114085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30105197209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30105197009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105624 + ... + 267145.

It is an arithmetic number, because the mean of its divisors is an integer number (7526412685).

Almost surely, 2^30105197209 is an apocalyptic number.

It is an amenable number.

30105197209 is a deficient number, since it is larger than the sum of its proper divisors (453531).

30105197209 is an equidigital number, since it uses as much as digits as its factorization.

30105197209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453530.

The product of its (nonzero) digits is 17010, while the sum is 37.

The spelling of 30105197209 in words is "thirty billion, one hundred five million, one hundred ninety-seven thousand, two hundred nine".