256103553 has 16 divisors (see below), whose sum is σ = 355841280. Its totient is φ = 163637376.

The previous prime is 256103531. The next prime is 256103563. The reversal of 256103553 is 355301652.

It is not a de Polignac number, because 256103553 - 2⁹ = 256103041 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 256103553.

It is not an unprimeable number, because it can be changed into a prime (256103503) 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 15 ways as a sum of consecutive naturals, for example, 1176 + ... + 22662.

It is an arithmetic number, because the mean of its divisors is an integer number (22240080).

Almost surely, 2^256103553 is an apocalyptic number.

It is an amenable number.

256103553 is a deficient number, since it is larger than the sum of its proper divisors (99737727).

256103553 is a wasteful number, since it uses less digits than its factorization.

256103553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21656.

The product of its (nonzero) digits is 13500, while the sum is 30.

The square root of 256103553 is about 16003.2357040693. The cubic root of 256103553 is about 635.0460239029.

The spelling of 256103553 in words is "two hundred fifty-six million, one hundred three thousand, five hundred fifty-three".