206331730 has 16 divisors (see below), whose sum is σ = 405160704. Its totient is φ = 75029680.

The previous prime is 206331709. The next prime is 206331731. The reversal of 206331730 is 37133602.

206331730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 206331695 and 206331704.

It is not an unprimeable number, because it can be changed into a prime (206331731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937762 + ... + 937981.

It is an arithmetic number, because the mean of its divisors is an integer number (25322544).

Almost surely, 2^206331730 is an apocalyptic number.

206331730 is a deficient number, since it is larger than the sum of its proper divisors (198828974).

206331730 is a wasteful number, since it uses less digits than its factorization.

206331730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875761.

The product of its (nonzero) digits is 2268, while the sum is 25.

The square root of 206331730 is about 14364.2518078736. The cubic root of 206331730 is about 590.9109073855.

The spelling of 206331730 in words is "two hundred six million, three hundred thirty-one thousand, seven hundred thirty".