256512525 has 24 divisors (see below), whose sum is σ = 424585920. Its totient is φ = 136650240.

The previous prime is 256512517. The next prime is 256512533. The reversal of 256512525 is 525215652.

It is an interprime number because it is at equal distance from previous prime (256512517) and next prime (256512533).

It is not a de Polignac number, because 256512525 - 2³ = 256512517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97629 + ... + 100221.

It is an arithmetic number, because the mean of its divisors is an integer number (17691080).

Almost surely, 2^256512525 is an apocalyptic number.

256512525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256512525 is a deficient number, since it is larger than the sum of its proper divisors (168073395).

256512525 is a wasteful number, since it uses less digits than its factorization.

256512525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3925 (or 3920 counting only the distinct ones).

The product of its digits is 30000, while the sum is 33.

The square root of 256512525 is about 16016.0083978499. The cubic root of 256512525 is about 635.3838793199.

The spelling of 256512525 in words is "two hundred fifty-six million, five hundred twelve thousand, five hundred twenty-five".