256558245 has 16 divisors (see below), whose sum is σ = 410754240. Its totient is φ = 136744064.

The previous prime is 256558243. The next prime is 256558249. The reversal of 256558245 is 542855652.

256558245 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 256558245 - 2¹ = 256558243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256558197 and 256558206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256558243) 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, 24121 + ... + 33089.

It is an arithmetic number, because the mean of its divisors is an integer number (25672140).

Almost surely, 2^256558245 is an apocalyptic number.

It is an amenable number.

256558245 is a deficient number, since it is larger than the sum of its proper divisors (154195995).

256558245 is a wasteful number, since it uses less digits than its factorization.

256558245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10884.

The product of its digits is 480000, while the sum is 42.

The square root of 256558245 is about 16017.4356561842. The cubic root of 256558245 is about 635.4216266972.

The spelling of 256558245 in words is "two hundred fifty-six million, five hundred fifty-eight thousand, two hundred forty-five".