206341505 has 4 divisors (see below), whose sum is σ = 247609812. Its totient is φ = 165073200.

The previous prime is 206341493. The next prime is 206341507. The reversal of 206341505 is 505143602.

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 98327056 + 108014449 = 9916^2 + 10393^2 .

It is not a de Polignac number, because 206341505 - 2¹⁴ = 206325121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206341507) 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, 20634146 + ... + 20634155.

It is an arithmetic number, because the mean of its divisors is an integer number (61902453).

Almost surely, 2^206341505 is an apocalyptic number.

It is an amenable number.

206341505 is a deficient number, since it is larger than the sum of its proper divisors (41268307).

206341505 is an equidigital number, since it uses as much as digits as its factorization.

206341505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41268306.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 206341505 is about 14364.5920582521. The cubic root of 206341505 is about 590.9202387389.

The spelling of 206341505 in words is "two hundred six million, three hundred forty-one thousand, five hundred five".