2256866473 has 4 divisors (see below), whose sum is σ = 2277571780. Its totient is φ = 2236161168.

The previous prime is 2256866441. The next prime is 2256866477. The reversal of 2256866473 is 3746686522.

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 1523106729 + 733759744 = 39027^2 + 27088^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256866473 - 2⁵ = 2256866441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2256866477) 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, 10352490 + ... + 10352707.

It is an arithmetic number, because the mean of its divisors is an integer number (569392945).

Almost surely, 2^2256866473 is an apocalyptic number.

It is an amenable number.

2256866473 is a deficient number, since it is larger than the sum of its proper divisors (20705307).

2256866473 is a wasteful number, since it uses less digits than its factorization.

2256866473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20705306.

The product of its digits is 2903040, while the sum is 49.

The square root of 2256866473 is about 47506.4887462755. The cubic root of 2256866473 is about 1311.7023248995.

The spelling of 2256866473 in words is "two billion, two hundred fifty-six million, eight hundred sixty-six thousand, four hundred seventy-three".