2256671543 has 4 divisors (see below), whose sum is σ = 2579053200. Its totient is φ = 1934289888.

The previous prime is 2256671537. The next prime is 2256671561. The reversal of 2256671543 is 3451766522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2256671543 - 2¹⁰ = 2256670519 is a prime.

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 2256671543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256671503) 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, 161190818 + ... + 161190831.

It is an arithmetic number, because the mean of its divisors is an integer number (644763300).

Almost surely, 2^2256671543 is an apocalyptic number.

2256671543 is a deficient number, since it is larger than the sum of its proper divisors (322381657).

2256671543 is an equidigital number, since it uses as much as digits as its factorization.

2256671543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322381656.

The product of its digits is 302400, while the sum is 41.

The square root of 2256671543 is about 47504.4370874974. The cubic root of 2256671543 is about 1311.6645590416.

The spelling of 2256671543 in words is "two billion, two hundred fifty-six million, six hundred seventy-one thousand, five hundred forty-three".