813268205 has 16 divisors (see below), whose sum is σ = 992003760. Its totient is φ = 639969792.

The previous prime is 813268187. The next prime is 813268207. The reversal of 813268205 is 502862318.

It can be written as a sum of positive squares in 8 ways, for example, as 52722121 + 760546084 = 7261^2 + 27578^2 .

It is a cyclic number.

It is not a de Polignac number, because 813268205 - 2¹⁶ = 813202669 is a prime.

It is a super-2 number, since 2×813268205² = 1322810346527844050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813268207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83027 + ... + 92303.

It is an arithmetic number, because the mean of its divisors is an integer number (62000235).

Almost surely, 2^813268205 is an apocalyptic number.

It is an amenable number.

813268205 is a deficient number, since it is larger than the sum of its proper divisors (178735555).

813268205 is a wasteful number, since it uses less digits than its factorization.

813268205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9568.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 813268205 is about 28517.8576509527. The cubic root of 813268205 is about 933.4217820798.

The spelling of 813268205 in words is "eight hundred thirteen million, two hundred sixty-eight thousand, two hundred five".