256554243 has 48 divisors (see below), whose sum is σ = 425174400. Its totient is φ = 152852040.

The previous prime is 256554239. The next prime is 256554253. The reversal of 256554243 is 342455652.

256554243 is a `hidden beast` number, since 2 + 565 + 54 + 2 + 43 = 666.

256554243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256554243 - 2² = 256554239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256554198 and 256554207.

It is not an unprimeable number, because it can be changed into a prime (256554253) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4348348 + ... + 4348406.

It is an arithmetic number, because the mean of its divisors is an integer number (8857800).

Almost surely, 2^256554243 is an apocalyptic number.

256554243 is a deficient number, since it is larger than the sum of its proper divisors (168620157).

256554243 is an frugal number, since it uses more digits than its factorization.

256554243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 73 counting only the distinct ones).

The product of its digits is 144000, while the sum is 36.

The square root of 256554243 is about 16017.3107293328. The cubic root of 256554243 is about 635.4183227424.

The spelling of 256554243 in words is "two hundred fifty-six million, five hundred fifty-four thousand, two hundred forty-three".