2256810001 has 4 divisors (see below), whose sum is σ = 2256952500. Its totient is φ = 2256667504.

The previous prime is 2256809999. The next prime is 2256810019. The reversal of 2256810001 is 1000186522.

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 1482635025 + 774174976 = 38505^2 + 27824^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256810001 - 2¹ = 2256809999 is a prime.

It is a super-2 number, since 2×2256810001² = 10186382761227240002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2256820001) 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, 44026 + ... + 80323.

It is an arithmetic number, because the mean of its divisors is an integer number (564238125).

Almost surely, 2^2256810001 is an apocalyptic number.

It is an amenable number.

2256810001 is a deficient number, since it is larger than the sum of its proper divisors (142499).

2256810001 is a wasteful number, since it uses less digits than its factorization.

2256810001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142498.

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

The square root of 2256810001 is about 47505.8943816449. The cubic root of 2256810001 is about 1311.6913842033.

Adding to 2256810001 its reverse (1000186522), we get a palindrome (3256996523).

The spelling of 2256810001 in words is "two billion, two hundred fifty-six million, eight hundred ten thousand, one".