256255051 has 4 divisors (see below), whose sum is σ = 275966992. Its totient is φ = 236543112.

The previous prime is 256255037. The next prime is 256255067. The reversal of 256255051 is 150552652.

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

It is not a de Polignac number, because 256255051 - 2⁵ = 256255019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256255751) 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 3 ways as a sum of consecutive naturals, for example, 9855951 + ... + 9855976.

It is an arithmetic number, because the mean of its divisors is an integer number (68991748).

Almost surely, 2^256255051 is an apocalyptic number.

256255051 is a deficient number, since it is larger than the sum of its proper divisors (19711941).

256255051 is a wasteful number, since it uses less digits than its factorization.

256255051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19711940.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 256255051 is about 16007.9683595389. The cubic root of 256255051 is about 635.1712196645.

The spelling of 256255051 in words is "two hundred fifty-six million, two hundred fifty-five thousand, fifty-one".