206400145 has 16 divisors (see below), whose sum is σ = 299714688. Its totient is φ = 133205760.

The previous prime is 206400119. The next prime is 206400157. The reversal of 206400145 is 541004602.

It is not a de Polignac number, because 206400145 - 2⁷ = 206400017 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 172851 + ... + 174040.

It is an arithmetic number, because the mean of its divisors is an integer number (18732168).

Almost surely, 2^206400145 is an apocalyptic number.

It is an amenable number.

206400145 is a deficient number, since it is larger than the sum of its proper divisors (93314543).

206400145 is a wasteful number, since it uses less digits than its factorization.

206400145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346920.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 206400145 is about 14366.6330432708. The cubic root of 206400145 is about 590.9762111277.

Adding to 206400145 its reverse (541004602), we get a palindrome (747404747).

The spelling of 206400145 in words is "two hundred six million, four hundred thousand, one hundred forty-five".