256363943 has 4 divisors (see below), whose sum is σ = 279669768. Its totient is φ = 233058120.

The previous prime is 256363931. The next prime is 256363949. The reversal of 256363943 is 349363652.

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 256363943 - 2⁶ = 256363879 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 256363943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256363949) 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, 11652896 + ... + 11652917.

It is an arithmetic number, because the mean of its divisors is an integer number (69917442).

Almost surely, 2^256363943 is an apocalyptic number.

256363943 is a deficient number, since it is larger than the sum of its proper divisors (23305825).

256363943 is a wasteful number, since it uses less digits than its factorization.

256363943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23305824.

The product of its digits is 349920, while the sum is 41.

The square root of 256363943 is about 16011.3691794300. The cubic root of 256363943 is about 635.2611759660.

The spelling of 256363943 in words is "two hundred fifty-six million, three hundred sixty-three thousand, nine hundred forty-three".