256315073 has 16 divisors (see below), whose sum is σ = 311418240. Its totient is φ = 206064000.

The previous prime is 256315063. The next prime is 256315091. The reversal of 256315073 is 370513652.

256315073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 256315073 - 2⁶ = 256315009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256315043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3893 + ... + 22973.

It is an arithmetic number, because the mean of its divisors is an integer number (19463640).

Almost surely, 2^256315073 is an apocalyptic number.

It is an amenable number.

256315073 is a deficient number, since it is larger than the sum of its proper divisors (55103167).

256315073 is a wasteful number, since it uses less digits than its factorization.

256315073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19208.

The product of its (nonzero) digits is 18900, while the sum is 32.

The square root of 256315073 is about 16009.8430036025. The cubic root of 256315073 is about 635.2208073320.

The spelling of 256315073 in words is "two hundred fifty-six million, three hundred fifteen thousand, seventy-three".