206115030 has 144 divisors (see below), whose sum is σ = 611734032. Its totient is φ = 49896000.

The previous prime is 206114971. The next prime is 206115047. The reversal of 206115030 is 30511602.

206115030 is a `hidden beast` number, since 2 + 0 + 611 + 50 + 3 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 206114994 and 206115012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 293680 + ... + 294380.

It is an arithmetic number, because the mean of its divisors is an integer number (4248153).

Almost surely, 2^206115030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206115030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305867016).

206115030 is an abundant number, since it is smaller than the sum of its proper divisors (405619002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206115030 is a wasteful number, since it uses less digits than its factorization.

206115030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 206115030 is about 14356.7067950836. The cubic root of 206115030 is about 590.7039667659.

Adding to 206115030 its reverse (30511602), we get a palindrome (236626632).

The spelling of 206115030 in words is "two hundred six million, one hundred fifteen thousand, thirty".