256550775 has 24 divisors (see below), whose sum is σ = 456793680. Its totient is φ = 126301440.

The previous prime is 256550747. The next prime is 256550779. The reversal of 256550775 is 577055652.

It is not a de Polignac number, because 256550775 - 2⁵ = 256550743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256550779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130590 + ... + 132539.

It is an arithmetic number, because the mean of its divisors is an integer number (19033070).

Almost surely, 2^256550775 is an apocalyptic number.

256550775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256550775 is a deficient number, since it is larger than the sum of its proper divisors (200242905).

256550775 is a wasteful number, since it uses less digits than its factorization.

256550775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263155 (or 263150 counting only the distinct ones).

The product of its (nonzero) digits is 367500, while the sum is 42.

The square root of 256550775 is about 16017.2024710934. The cubic root of 256550775 is about 635.4154596173.

The spelling of 256550775 in words is "two hundred fifty-six million, five hundred fifty thousand, seven hundred seventy-five".