525256520 has 128 divisors (see below), whose sum is σ = 1313280000. Its totient is φ = 188179200.

The previous prime is 525256519. The next prime is 525256547. The reversal of 525256520 is 25652525.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2639381 + ... + 2639579.

It is an arithmetic number, because the mean of its divisors is an integer number (10260000).

Almost surely, 2^525256520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525256520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (656640000).

525256520 is an abundant number, since it is smaller than the sum of its proper divisors (788023480).

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

525256520 is a wasteful number, since it uses less digits than its factorization.

525256520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 32.

The square root of 525256520 is about 22918.4755164911. The cubic root of 525256520 is about 806.8456910524.

The spelling of 525256520 in words is "five hundred twenty-five million, two hundred fifty-six thousand, five hundred twenty".