206232505 has 4 divisors (see below), whose sum is σ = 247479012. Its totient is φ = 164986000.

The previous prime is 206232503. The next prime is 206232511. The reversal of 206232505 is 505232602.

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 61968384 + 144264121 = 7872^2 + 12011^2 .

It is not a de Polignac number, because 206232505 - 2¹ = 206232503 is a prime.

It is a super-2 number, since 2×206232505² = 85063692237150050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206232505.

It is not an unprimeable number, because it can be changed into a prime (206232503) 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, 20623246 + ... + 20623255.

It is an arithmetic number, because the mean of its divisors is an integer number (61869753).

Almost surely, 2^206232505 is an apocalyptic number.

It is an amenable number.

206232505 is a deficient number, since it is larger than the sum of its proper divisors (41246507).

206232505 is an equidigital number, since it uses as much as digits as its factorization.

206232505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41246506.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 206232505 is about 14360.7975057098. The cubic root of 206232505 is about 590.8161691110.

The spelling of 206232505 in words is "two hundred six million, two hundred thirty-two thousand, five hundred five".