810256201 has 4 divisors (see below), whose sum is σ = 838196100. Its totient is φ = 782316304.

The previous prime is 810256169. The next prime is 810256277. The reversal of 810256201 is 102652018.

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 660438601 + 149817600 = 25699^2 + 12240^2 .

It is a cyclic number.

It is not a de Polignac number, because 810256201 - 2⁵ = 810256169 is a prime.

It is a super-2 number, since 2×810256201² = 1313030222517904802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (810250201) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13969906 + ... + 13969963.

It is an arithmetic number, because the mean of its divisors is an integer number (209549025).

Almost surely, 2^810256201 is an apocalyptic number.

It is an amenable number.

810256201 is a deficient number, since it is larger than the sum of its proper divisors (27939899).

810256201 is a wasteful number, since it uses less digits than its factorization.

810256201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27939898.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 810256201 is about 28464.9995784296. Note that the first 3 decimals coincide. The cubic root of 810256201 is about 932.2680224229.

The spelling of 810256201 in words is "eight hundred ten million, two hundred fifty-six thousand, two hundred one".