256565525 has 12 divisors (see below), whose sum is σ = 319812864. Its totient is φ = 204174000.

The previous prime is 256565497. The next prime is 256565539. The reversal of 256565525 is 525565652.

256565525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256565525 - 2⁶ = 256565461 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 22091 + ... + 31640.

It is an arithmetic number, because the mean of its divisors is an integer number (26651072).

Almost surely, 2^256565525 is an apocalyptic number.

256565525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256565525 is a deficient number, since it is larger than the sum of its proper divisors (63247339).

256565525 is a wasteful number, since it uses less digits than its factorization.

256565525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53932 (or 53927 counting only the distinct ones).

The product of its digits is 450000, while the sum is 41.

The square root of 256565525 is about 16017.6629069287. The cubic root of 256565525 is about 635.4276368019.

The spelling of 256565525 in words is "two hundred fifty-six million, five hundred sixty-five thousand, five hundred twenty-five".