256335049 has 4 divisors (see below), whose sum is σ = 256634320. Its totient is φ = 256035780.

The previous prime is 256335029. The next prime is 256335077. The reversal of 256335049 is 940533652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256335049 - 2¹⁵ = 256302281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256334999 and 256335017.

It is not an unprimeable number, because it can be changed into a prime (256335019) 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, 148347 + ... + 150064.

It is an arithmetic number, because the mean of its divisors is an integer number (64158580).

Almost surely, 2^256335049 is an apocalyptic number.

It is an amenable number.

256335049 is a deficient number, since it is larger than the sum of its proper divisors (299271).

256335049 is an equidigital number, since it uses as much as digits as its factorization.

256335049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299270.

The product of its (nonzero) digits is 97200, while the sum is 37.

The square root of 256335049 is about 16010.4668576528. The cubic root of 256335049 is about 635.2373089512.

The spelling of 256335049 in words is "two hundred fifty-six million, three hundred thirty-five thousand, forty-nine".