206315801 has 4 divisors (see below), whose sum is σ = 206381604. Its totient is φ = 206250000.

The previous prime is 206315771. The next prime is 206315833. The reversal of 206315801 is 108513602.

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 149328400 + 56987401 = 12220^2 + 7549^2 .

It is a cyclic number.

It is not a de Polignac number, because 206315801 - 2¹⁰ = 206314777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (206315891) 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, 27950 + ... + 34551.

It is an arithmetic number, because the mean of its divisors is an integer number (51595401).

Almost surely, 2^206315801 is an apocalyptic number.

It is an amenable number.

206315801 is a deficient number, since it is larger than the sum of its proper divisors (65803).

206315801 is an equidigital number, since it uses as much as digits as its factorization.

206315801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65802.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 206315801 is about 14363.6973304230. The cubic root of 206315801 is about 590.8957007050.

The spelling of 206315801 in words is "two hundred six million, three hundred fifteen thousand, eight hundred one".