256275277 has 4 divisors (see below), whose sum is σ = 256371516. Its totient is φ = 256179040.

The previous prime is 256275263. The next prime is 256275293. The reversal of 256275277 is 772572652.

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

It can be written as a sum of positive squares in 2 ways, for example, as 147719716 + 108555561 = 12154^2 + 10419^2 .

It is a cyclic number.

It is not a de Polignac number, because 256275277 - 2¹⁵ = 256242509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256275247) 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, 44008 + ... + 49489.

It is an arithmetic number, because the mean of its divisors is an integer number (64092879).

Almost surely, 2^256275277 is an apocalyptic number.

It is an amenable number.

256275277 is a deficient number, since it is larger than the sum of its proper divisors (96239).

256275277 is an equidigital number, since it uses as much as digits as its factorization.

256275277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96238.

The product of its digits is 411600, while the sum is 43.

The square root of 256275277 is about 16008.6000949490. The cubic root of 256275277 is about 635.1879304052.

The spelling of 256275277 in words is "two hundred fifty-six million, two hundred seventy-five thousand, two hundred seventy-seven".