256565526 has 32 divisors (see below), whose sum is σ = 589401600. Its totient is φ = 72933696.

The previous prime is 256565497. The next prime is 256565539. The reversal of 256565526 is 625565652.

256565526 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6991 + ... + 23706.

It is an arithmetic number, because the mean of its divisors is an integer number (18418800).

Almost surely, 2^256565526 is an apocalyptic number.

256565526 is an abundant number, since it is smaller than the sum of its proper divisors (332836074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256565526 is a wasteful number, since it uses less digits than its factorization.

256565526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30908.

The product of its digits is 540000, while the sum is 42.

The square root of 256565526 is about 16017.6629381443. The cubic root of 256565526 is about 635.4276376274.

The spelling of 256565526 in words is "two hundred fifty-six million, five hundred sixty-five thousand, five hundred twenty-six".